Home / 20,499.40-28,290.62-11,425.34

Finding the Fourth Proportional to 20,499.40, 28,290.62 and 11,425.34

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Solution

The fourth proportional to 20,499.40, 28,290.62 and 11,425.34 is: 15,767.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.40 : 28,290.62 = 11,425.34 : x
  2. Step 2: Convert to fraction form
    20,499.40/28,290.62 = 11,425.34/x
  3. Step 3: Cross multiply
    20,499.40x = 28,290.62 × 11,425.34
  4. Step 4: Simplify right side
    20,499.40x = 323,229,753.73
  5. Step 5: Solve for x
    x = 323,229,753.73/20,499.40
  6. Step 6: Final answer
    x = 15,767.77

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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.