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Finding the Fourth Proportional to 28,614.78, 42,874.65 and 20,253.42

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Solution

The fourth proportional to 28,614.78, 42,874.65 and 20,253.42 is: 30,346.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,614.78 : 42,874.65 = 20,253.42 : x
  2. Step 2: Convert to fraction form
    28,614.78/42,874.65 = 20,253.42/x
  3. Step 3: Cross multiply
    28,614.78x = 42,874.65 × 20,253.42
  4. Step 4: Simplify right side
    28,614.78x = 868,358,293.80
  5. Step 5: Solve for x
    x = 868,358,293.80/28,614.78
  6. Step 6: Final answer
    x = 30,346.50

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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.