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Finding the Fourth Proportional to 15,874.03, 21,901.18 and 9,909.16

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Solution

The fourth proportional to 15,874.03, 21,901.18 and 9,909.16 is: 13,671.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.03 : 21,901.18 = 9,909.16 : x
  2. Step 2: Convert to fraction form
    15,874.03/21,901.18 = 9,909.16/x
  3. Step 3: Cross multiply
    15,874.03x = 21,901.18 × 9,909.16
  4. Step 4: Simplify right side
    15,874.03x = 217,022,321.85
  5. Step 5: Solve for x
    x = 217,022,321.85/15,874.03
  6. Step 6: Final answer
    x = 13,671.53

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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.