Home / 21,133.53-31,691.66-7,279.29

Finding the Fourth Proportional to 21,133.53, 31,691.66 and 7,279.29

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Solution

The fourth proportional to 21,133.53, 31,691.66 and 7,279.29 is: 10,915.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.53 : 31,691.66 = 7,279.29 : x
  2. Step 2: Convert to fraction form
    21,133.53/31,691.66 = 7,279.29/x
  3. Step 3: Cross multiply
    21,133.53x = 31,691.66 × 7,279.29
  4. Step 4: Simplify right side
    21,133.53x = 230,692,747.32
  5. Step 5: Solve for x
    x = 230,692,747.32/21,133.53
  6. Step 6: Final answer
    x = 10,915.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.