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Finding the Fourth Proportional to 18,720.88, 25,834.32 and 10,337.20

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Solution

The fourth proportional to 18,720.88, 25,834.32 and 10,337.20 is: 14,265.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.88 : 25,834.32 = 10,337.20 : x
  2. Step 2: Convert to fraction form
    18,720.88/25,834.32 = 10,337.20/x
  3. Step 3: Cross multiply
    18,720.88x = 25,834.32 × 10,337.20
  4. Step 4: Simplify right side
    18,720.88x = 267,054,532.70
  5. Step 5: Solve for x
    x = 267,054,532.70/18,720.88
  6. Step 6: Final answer
    x = 14,265.06

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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.