Home / 20,686.74-28,538.55-12,724.26

Finding the Fourth Proportional to 20,686.74, 28,538.55 and 12,724.26

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Solution

The fourth proportional to 20,686.74, 28,538.55 and 12,724.26 is: 17,553.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.74 : 28,538.55 = 12,724.26 : x
  2. Step 2: Convert to fraction form
    20,686.74/28,538.55 = 12,724.26/x
  3. Step 3: Cross multiply
    20,686.74x = 28,538.55 × 12,724.26
  4. Step 4: Simplify right side
    20,686.74x = 363,131,930.22
  5. Step 5: Solve for x
    x = 363,131,930.22/20,686.74
  6. Step 6: Final answer
    x = 17,553.85

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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.