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Finding the Fourth Proportional to 19,229.92, 28,825.08 and 13,951.78

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Solution

The fourth proportional to 19,229.92, 28,825.08 and 13,951.78 is: 20,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,229.92 : 28,825.08 = 13,951.78 : x
  2. Step 2: Convert to fraction form
    19,229.92/28,825.08 = 13,951.78/x
  3. Step 3: Cross multiply
    19,229.92x = 28,825.08 × 13,951.78
  4. Step 4: Simplify right side
    19,229.92x = 402,161,174.64
  5. Step 5: Solve for x
    x = 402,161,174.64/19,229.92
  6. Step 6: Final answer
    x = 20,913.30

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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.