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Finding the Fourth Proportional to 18,403.92, 27,605.88 and 12,162.47

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Solution

The fourth proportional to 18,403.92, 27,605.88 and 12,162.47 is: 18,243.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.92 : 27,605.88 = 12,162.47 : x
  2. Step 2: Convert to fraction form
    18,403.92/27,605.88 = 12,162.47/x
  3. Step 3: Cross multiply
    18,403.92x = 27,605.88 × 12,162.47
  4. Step 4: Simplify right side
    18,403.92x = 335,755,549.29
  5. Step 5: Solve for x
    x = 335,755,549.29/18,403.92
  6. Step 6: Final answer
    x = 18,243.70

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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.