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Finding the Fourth Proportional to 10,638.59, 15,957.89 and 2,847.20

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Solution

The fourth proportional to 10,638.59, 15,957.89 and 2,847.20 is: 4,270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,638.59 : 15,957.89 = 2,847.20 : x
  2. Step 2: Convert to fraction form
    10,638.59/15,957.89 = 2,847.20/x
  3. Step 3: Cross multiply
    10,638.59x = 15,957.89 × 2,847.20
  4. Step 4: Simplify right side
    10,638.59x = 45,435,210.38
  5. Step 5: Solve for x
    x = 45,435,210.38/10,638.59
  6. Step 6: Final answer
    x = 4,270.79

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.