Home / 21,279.30-31,918.33-5,696.92

Finding the Fourth Proportional to 21,279.30, 31,918.33 and 5,696.92

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Solution

The fourth proportional to 21,279.30, 31,918.33 and 5,696.92 is: 8,545.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.30 : 31,918.33 = 5,696.92 : x
  2. Step 2: Convert to fraction form
    21,279.30/31,918.33 = 5,696.92/x
  3. Step 3: Cross multiply
    21,279.30x = 31,918.33 × 5,696.92
  4. Step 4: Simplify right side
    21,279.30x = 181,836,172.54
  5. Step 5: Solve for x
    x = 181,836,172.54/21,279.30
  6. Step 6: Final answer
    x = 8,545.21

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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.