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Finding the Fourth Proportional to 19,793.76, 29,689.92 and 5,942.40

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Solution

The fourth proportional to 19,793.76, 29,689.92 and 5,942.40 is: 8,913.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.76 : 29,689.92 = 5,942.40 : x
  2. Step 2: Convert to fraction form
    19,793.76/29,689.92 = 5,942.40/x
  3. Step 3: Cross multiply
    19,793.76x = 29,689.92 × 5,942.40
  4. Step 4: Simplify right side
    19,793.76x = 176,429,380.61
  5. Step 5: Solve for x
    x = 176,429,380.61/19,793.76
  6. Step 6: Final answer
    x = 8,913.38

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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.