Home / 15,717.38-21,690.30-8,644.18

Finding the Fourth Proportional to 15,717.38, 21,690.30 and 8,644.18

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Solution

The fourth proportional to 15,717.38, 21,690.30 and 8,644.18 is: 11,929.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.38 : 21,690.30 = 8,644.18 : x
  2. Step 2: Convert to fraction form
    15,717.38/21,690.30 = 8,644.18/x
  3. Step 3: Cross multiply
    15,717.38x = 21,690.30 × 8,644.18
  4. Step 4: Simplify right side
    15,717.38x = 187,494,857.45
  5. Step 5: Solve for x
    x = 187,494,857.45/15,717.38
  6. Step 6: Final answer
    x = 11,929.14

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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.