Home / 20,571.03-28,387.98-11,139.62

Finding the Fourth Proportional to 20,571.03, 28,387.98 and 11,139.62

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Solution

The fourth proportional to 20,571.03, 28,387.98 and 11,139.62 is: 15,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.03 : 28,387.98 = 11,139.62 : x
  2. Step 2: Convert to fraction form
    20,571.03/28,387.98 = 11,139.62/x
  3. Step 3: Cross multiply
    20,571.03x = 28,387.98 × 11,139.62
  4. Step 4: Simplify right side
    20,571.03x = 316,231,167.83
  5. Step 5: Solve for x
    x = 316,231,167.83/20,571.03
  6. Step 6: Final answer
    x = 15,372.65

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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.