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Finding the Fourth Proportional to 18,456.80, 27,679.80 and 6,609.20

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Solution

The fourth proportional to 18,456.80, 27,679.80 and 6,609.20 is: 9,911.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.80 : 27,679.80 = 6,609.20 : x
  2. Step 2: Convert to fraction form
    18,456.80/27,679.80 = 6,609.20/x
  3. Step 3: Cross multiply
    18,456.80x = 27,679.80 × 6,609.20
  4. Step 4: Simplify right side
    18,456.80x = 182,941,334.16
  5. Step 5: Solve for x
    x = 182,941,334.16/18,456.80
  6. Step 6: Final answer
    x = 9,911.87

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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.