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Finding the Fourth Proportional to 15,882.03, 21,921.50 and 9,910.17

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Solution

The fourth proportional to 15,882.03, 21,921.50 and 9,910.17 is: 13,678.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.03 : 21,921.50 = 9,910.17 : x
  2. Step 2: Convert to fraction form
    15,882.03/21,921.50 = 9,910.17/x
  3. Step 3: Cross multiply
    15,882.03x = 21,921.50 × 9,910.17
  4. Step 4: Simplify right side
    15,882.03x = 217,245,816.43
  5. Step 5: Solve for x
    x = 217,245,816.43/15,882.03
  6. Step 6: Final answer
    x = 13,678.72

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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.