Home / 20,376.57-28,121.01-11,424.66

Finding the Fourth Proportional to 20,376.57, 28,121.01 and 11,424.66

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Solution

The fourth proportional to 20,376.57, 28,121.01 and 11,424.66 is: 15,766.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.57 : 28,121.01 = 11,424.66 : x
  2. Step 2: Convert to fraction form
    20,376.57/28,121.01 = 11,424.66/x
  3. Step 3: Cross multiply
    20,376.57x = 28,121.01 × 11,424.66
  4. Step 4: Simplify right side
    20,376.57x = 321,272,978.11
  5. Step 5: Solve for x
    x = 321,272,978.11/20,376.57
  6. Step 6: Final answer
    x = 15,766.78

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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.