Home / 20,397.20-28,149.48-11,445.32

Finding the Fourth Proportional to 20,397.20, 28,149.48 and 11,445.32

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Solution

The fourth proportional to 20,397.20, 28,149.48 and 11,445.32 is: 15,795.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.20 : 28,149.48 = 11,445.32 : x
  2. Step 2: Convert to fraction form
    20,397.20/28,149.48 = 11,445.32/x
  3. Step 3: Cross multiply
    20,397.20x = 28,149.48 × 11,445.32
  4. Step 4: Simplify right side
    20,397.20x = 322,179,806.43
  5. Step 5: Solve for x
    x = 322,179,806.43/20,397.20
  6. Step 6: Final answer
    x = 15,795.30

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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.