Home / 15,926.91-21,979.41-8,757.12

Finding the Fourth Proportional to 15,926.91, 21,979.41 and 8,757.12

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Solution

The fourth proportional to 15,926.91, 21,979.41 and 8,757.12 is: 12,084.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,926.91 : 21,979.41 = 8,757.12 : x
  2. Step 2: Convert to fraction form
    15,926.91/21,979.41 = 8,757.12/x
  3. Step 3: Cross multiply
    15,926.91x = 21,979.41 × 8,757.12
  4. Step 4: Simplify right side
    15,926.91x = 192,476,330.90
  5. Step 5: Solve for x
    x = 192,476,330.90/15,926.91
  6. Step 6: Final answer
    x = 12,084.98

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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.