Home / 20,837.13-28,755.26-11,405.71

Finding the Fourth Proportional to 20,837.13, 28,755.26 and 11,405.71

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Solution

The fourth proportional to 20,837.13, 28,755.26 and 11,405.71 is: 15,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.13 : 28,755.26 = 11,405.71 : x
  2. Step 2: Convert to fraction form
    20,837.13/28,755.26 = 11,405.71/x
  3. Step 3: Cross multiply
    20,837.13x = 28,755.26 × 11,405.71
  4. Step 4: Simplify right side
    20,837.13x = 327,974,156.53
  5. Step 5: Solve for x
    x = 327,974,156.53/20,837.13
  6. Step 6: Final answer
    x = 15,739.89

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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.