Home / 21,268.97-31,916.36-7,951.65

Finding the Fourth Proportional to 21,268.97, 31,916.36 and 7,951.65

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Solution

The fourth proportional to 21,268.97, 31,916.36 and 7,951.65 is: 11,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.97 : 31,916.36 = 7,951.65 : x
  2. Step 2: Convert to fraction form
    21,268.97/31,916.36 = 7,951.65/x
  3. Step 3: Cross multiply
    21,268.97x = 31,916.36 × 7,951.65
  4. Step 4: Simplify right side
    21,268.97x = 253,787,684.24
  5. Step 5: Solve for x
    x = 253,787,684.24/21,268.97
  6. Step 6: Final answer
    x = 11,932.30

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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.