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Finding the Fourth Proportional to 20,658.92, 30,988.20 and 8,980.52

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Solution

The fourth proportional to 20,658.92, 30,988.20 and 8,980.52 is: 13,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.92 : 30,988.20 = 8,980.52 : x
  2. Step 2: Convert to fraction form
    20,658.92/30,988.20 = 8,980.52/x
  3. Step 3: Cross multiply
    20,658.92x = 30,988.20 × 8,980.52
  4. Step 4: Simplify right side
    20,658.92x = 278,290,149.86
  5. Step 5: Solve for x
    x = 278,290,149.86/20,658.92
  6. Step 6: Final answer
    x = 13,470.70

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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.