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Finding the Fourth Proportional to 20,715.92, 31,079 and 6,677.12

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Solution

The fourth proportional to 20,715.92, 31,079 and 6,677.12 is: 10,017.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.92 : 31,079 = 6,677.12 : x
  2. Step 2: Convert to fraction form
    20,715.92/31,079 = 6,677.12/x
  3. Step 3: Cross multiply
    20,715.92x = 31,079 × 6,677.12
  4. Step 4: Simplify right side
    20,715.92x = 207,518,212.48
  5. Step 5: Solve for x
    x = 207,518,212.48/20,715.92
  6. Step 6: Final answer
    x = 10,017.33

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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.