Home / 20,922.24-28,872-12,532.80

Finding the Fourth Proportional to 20,922.24, 28,872 and 12,532.80

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Solution

The fourth proportional to 20,922.24, 28,872 and 12,532.80 is: 17,294.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.24 : 28,872 = 12,532.80 : x
  2. Step 2: Convert to fraction form
    20,922.24/28,872 = 12,532.80/x
  3. Step 3: Cross multiply
    20,922.24x = 28,872 × 12,532.80
  4. Step 4: Simplify right side
    20,922.24x = 361,847,001.60
  5. Step 5: Solve for x
    x = 361,847,001.60/20,922.24
  6. Step 6: Final answer
    x = 17,294.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.