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Finding the Fourth Proportional to 8,116.86, 11,201.31 and 4,390.86

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Solution

The fourth proportional to 8,116.86, 11,201.31 and 4,390.86 is: 6,059.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,116.86 : 11,201.31 = 4,390.86 : x
  2. Step 2: Convert to fraction form
    8,116.86/11,201.31 = 4,390.86/x
  3. Step 3: Cross multiply
    8,116.86x = 11,201.31 × 4,390.86
  4. Step 4: Simplify right side
    8,116.86x = 49,183,384.03
  5. Step 5: Solve for x
    x = 49,183,384.03/8,116.86
  6. Step 6: Final answer
    x = 6,059.41

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Find fourth proportional to 4,058.43, 5,600.66 and 2,195.43
Half scale
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Double scale
Find fourth proportional to 8,117.86, 11,202.69 and 4,391.86
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.