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Finding the Fourth Proportional to 20,473.46, 30,711.06 and 7,147.79

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Solution

The fourth proportional to 20,473.46, 30,711.06 and 7,147.79 is: 10,721.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,473.46 : 30,711.06 = 7,147.79 : x
  2. Step 2: Convert to fraction form
    20,473.46/30,711.06 = 7,147.79/x
  3. Step 3: Cross multiply
    20,473.46x = 30,711.06 × 7,147.79
  4. Step 4: Simplify right side
    20,473.46x = 219,516,270.93
  5. Step 5: Solve for x
    x = 219,516,270.93/20,473.46
  6. Step 6: Final answer
    x = 10,721.99

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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.