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Finding the Fourth Proportional to 8,130.76, 11,220.44 and 4,404.76

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Solution

The fourth proportional to 8,130.76, 11,220.44 and 4,404.76 is: 6,078.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.76 : 11,220.44 = 4,404.76 : x
  2. Step 2: Convert to fraction form
    8,130.76/11,220.44 = 4,404.76/x
  3. Step 3: Cross multiply
    8,130.76x = 11,220.44 × 4,404.76
  4. Step 4: Simplify right side
    8,130.76x = 49,423,345.29
  5. Step 5: Solve for x
    x = 49,423,345.29/8,130.76
  6. Step 6: Final answer
    x = 6,078.56

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Half scale
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Double scale
Find fourth proportional to 8,131.76, 11,221.82 and 4,405.76
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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.