Home / 20,613.88-28,446.60-11,415.11

Finding the Fourth Proportional to 20,613.88, 28,446.60 and 11,415.11

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Solution

The fourth proportional to 20,613.88, 28,446.60 and 11,415.11 is: 15,752.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.88 : 28,446.60 = 11,415.11 : x
  2. Step 2: Convert to fraction form
    20,613.88/28,446.60 = 11,415.11/x
  3. Step 3: Cross multiply
    20,613.88x = 28,446.60 × 11,415.11
  4. Step 4: Simplify right side
    20,613.88x = 324,721,068.13
  5. Step 5: Solve for x
    x = 324,721,068.13/20,613.88
  6. Step 6: Final answer
    x = 15,752.55

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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.