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Finding the Fourth Proportional to 12,387.62, 18,555.44 and 9,742.70

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Solution

The fourth proportional to 12,387.62, 18,555.44 and 9,742.70 is: 14,593.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.62 : 18,555.44 = 9,742.70 : x
  2. Step 2: Convert to fraction form
    12,387.62/18,555.44 = 9,742.70/x
  3. Step 3: Cross multiply
    12,387.62x = 18,555.44 × 9,742.70
  4. Step 4: Simplify right side
    12,387.62x = 180,779,943.80
  5. Step 5: Solve for x
    x = 180,779,943.80/12,387.62
  6. Step 6: Final answer
    x = 14,593.60

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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.