Home / 15,718.43-21,691.32-8,644.70

Finding the Fourth Proportional to 15,718.43, 21,691.32 and 8,644.70

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Solution

The fourth proportional to 15,718.43, 21,691.32 and 8,644.70 is: 11,929.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.43 : 21,691.32 = 8,644.70 : x
  2. Step 2: Convert to fraction form
    15,718.43/21,691.32 = 8,644.70/x
  3. Step 3: Cross multiply
    15,718.43x = 21,691.32 × 8,644.70
  4. Step 4: Simplify right side
    15,718.43x = 187,514,954.00
  5. Step 5: Solve for x
    x = 187,514,954.00/15,718.43
  6. Step 6: Final answer
    x = 11,929.62

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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.