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Finding the Fourth Proportional to 18,193.12, 25,109.04 and 15,204.16

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Solution

The fourth proportional to 18,193.12, 25,109.04 and 15,204.16 is: 20,983.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,193.12 : 25,109.04 = 15,204.16 : x
  2. Step 2: Convert to fraction form
    18,193.12/25,109.04 = 15,204.16/x
  3. Step 3: Cross multiply
    18,193.12x = 25,109.04 × 15,204.16
  4. Step 4: Simplify right side
    18,193.12x = 381,761,861.61
  5. Step 5: Solve for x
    x = 381,761,861.61/18,193.12
  6. Step 6: Final answer
    x = 20,983.86

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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.