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Finding the Fourth Proportional to 28,501.43, 42,753.01 and 9,781.20

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Solution

The fourth proportional to 28,501.43, 42,753.01 and 9,781.20 is: 14,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,501.43 : 42,753.01 = 9,781.20 : x
  2. Step 2: Convert to fraction form
    28,501.43/42,753.01 = 9,781.20/x
  3. Step 3: Cross multiply
    28,501.43x = 42,753.01 × 9,781.20
  4. Step 4: Simplify right side
    28,501.43x = 418,175,741.41
  5. Step 5: Solve for x
    x = 418,175,741.41/28,501.43
  6. Step 6: Final answer
    x = 14,672.10

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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.