Home / 15,927.31-21,979.65-8,757.15

Finding the Fourth Proportional to 15,927.31, 21,979.65 and 8,757.15

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Solution

The fourth proportional to 15,927.31, 21,979.65 and 8,757.15 is: 12,084.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.31 : 21,979.65 = 8,757.15 : x
  2. Step 2: Convert to fraction form
    15,927.31/21,979.65 = 8,757.15/x
  3. Step 3: Cross multiply
    15,927.31x = 21,979.65 × 8,757.15
  4. Step 4: Simplify right side
    15,927.31x = 192,479,092.00
  5. Step 5: Solve for x
    x = 192,479,092.00/15,927.31
  6. Step 6: Final answer
    x = 12,084.85

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1.5x scale

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.