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Finding the Fourth Proportional to 18,267.31, 27,402.18 and 5,120.20

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Solution

The fourth proportional to 18,267.31, 27,402.18 and 5,120.20 is: 7,680.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,267.31 : 27,402.18 = 5,120.20 : x
  2. Step 2: Convert to fraction form
    18,267.31/27,402.18 = 5,120.20/x
  3. Step 3: Cross multiply
    18,267.31x = 27,402.18 × 5,120.20
  4. Step 4: Simplify right side
    18,267.31x = 140,304,642.04
  5. Step 5: Solve for x
    x = 140,304,642.04/18,267.31
  6. Step 6: Final answer
    x = 7,680.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.