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Finding the Fourth Proportional to 18,862.80, 28,294.20 and 12,301.80

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Solution

The fourth proportional to 18,862.80, 28,294.20 and 12,301.80 is: 18,452.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,862.80 : 28,294.20 = 12,301.80 : x
  2. Step 2: Convert to fraction form
    18,862.80/28,294.20 = 12,301.80/x
  3. Step 3: Cross multiply
    18,862.80x = 28,294.20 × 12,301.80
  4. Step 4: Simplify right side
    18,862.80x = 348,069,589.56
  5. Step 5: Solve for x
    x = 348,069,589.56/18,862.80
  6. Step 6: Final answer
    x = 18,452.70

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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.