Home / 20,648.82-28,499.89-13,575.90

Finding the Fourth Proportional to 20,648.82, 28,499.89 and 13,575.90

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Solution

The fourth proportional to 20,648.82, 28,499.89 and 13,575.90 is: 18,737.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.82 : 28,499.89 = 13,575.90 : x
  2. Step 2: Convert to fraction form
    20,648.82/28,499.89 = 13,575.90/x
  3. Step 3: Cross multiply
    20,648.82x = 28,499.89 × 13,575.90
  4. Step 4: Simplify right side
    20,648.82x = 386,911,656.65
  5. Step 5: Solve for x
    x = 386,911,656.65/20,648.82
  6. Step 6: Final answer
    x = 18,737.71

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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.