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Finding the Fourth Proportional to 18,778.92, 28,127.89 and 17,674.83

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Solution

The fourth proportional to 18,778.92, 28,127.89 and 17,674.83 is: 26,474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.92 : 28,127.89 = 17,674.83 : x
  2. Step 2: Convert to fraction form
    18,778.92/28,127.89 = 17,674.83/x
  3. Step 3: Cross multiply
    18,778.92x = 28,127.89 × 17,674.83
  4. Step 4: Simplify right side
    18,778.92x = 497,155,581.98
  5. Step 5: Solve for x
    x = 497,155,581.98/18,778.92
  6. Step 6: Final answer
    x = 26,474.13

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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.