Home / 20,834.52-28,752.12-11,403.78

Finding the Fourth Proportional to 20,834.52, 28,752.12 and 11,403.78

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Solution

The fourth proportional to 20,834.52, 28,752.12 and 11,403.78 is: 15,737.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.52 : 28,752.12 = 11,403.78 : x
  2. Step 2: Convert to fraction form
    20,834.52/28,752.12 = 11,403.78/x
  3. Step 3: Cross multiply
    20,834.52x = 28,752.12 × 11,403.78
  4. Step 4: Simplify right side
    20,834.52x = 327,882,851.01
  5. Step 5: Solve for x
    x = 327,882,851.01/20,834.52
  6. Step 6: Final answer
    x = 15,737.48

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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.