Home / 20,398.22-28,149.28-11,445.90

Finding the Fourth Proportional to 20,398.22, 28,149.28 and 11,445.90

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Solution

The fourth proportional to 20,398.22, 28,149.28 and 11,445.90 is: 15,795.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.22 : 28,149.28 = 11,445.90 : x
  2. Step 2: Convert to fraction form
    20,398.22/28,149.28 = 11,445.90/x
  3. Step 3: Cross multiply
    20,398.22x = 28,149.28 × 11,445.90
  4. Step 4: Simplify right side
    20,398.22x = 322,193,843.95
  5. Step 5: Solve for x
    x = 322,193,843.95/20,398.22
  6. Step 6: Final answer
    x = 15,795.19

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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.