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Finding the Fourth Proportional to 18,700.92, 28,024.65 and 13,731.57

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Solution

The fourth proportional to 18,700.92, 28,024.65 and 13,731.57 is: 20,577.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.92 : 28,024.65 = 13,731.57 : x
  2. Step 2: Convert to fraction form
    18,700.92/28,024.65 = 13,731.57/x
  3. Step 3: Cross multiply
    18,700.92x = 28,024.65 × 13,731.57
  4. Step 4: Simplify right side
    18,700.92x = 384,822,443.20
  5. Step 5: Solve for x
    x = 384,822,443.20/18,700.92
  6. Step 6: Final answer
    x = 20,577.73

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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.