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Finding the Fourth Proportional to 8,115.63, 11,199.59 and 4,389.63

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Solution

The fourth proportional to 8,115.63, 11,199.59 and 4,389.63 is: 6,057.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.63 : 11,199.59 = 4,389.63 : x
  2. Step 2: Convert to fraction form
    8,115.63/11,199.59 = 4,389.63/x
  3. Step 3: Cross multiply
    8,115.63x = 11,199.59 × 4,389.63
  4. Step 4: Simplify right side
    8,115.63x = 49,162,056.25
  5. Step 5: Solve for x
    x = 49,162,056.25/8,115.63
  6. Step 6: Final answer
    x = 6,057.70

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Half scale
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Double scale
Find fourth proportional to 8,116.63, 11,200.97 and 4,390.63
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.