Home / 20,398.80-28,149.24-11,444.72

Finding the Fourth Proportional to 20,398.80, 28,149.24 and 11,444.72

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Solution

The fourth proportional to 20,398.80, 28,149.24 and 11,444.72 is: 15,793.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.80 : 28,149.24 = 11,444.72 : x
  2. Step 2: Convert to fraction form
    20,398.80/28,149.24 = 11,444.72/x
  3. Step 3: Cross multiply
    20,398.80x = 28,149.24 × 11,444.72
  4. Step 4: Simplify right side
    20,398.80x = 322,160,170.01
  5. Step 5: Solve for x
    x = 322,160,170.01/20,398.80
  6. Step 6: Final answer
    x = 15,793.09

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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.