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Finding the Fourth Proportional to 18,850.30, 28,239.20 and 9,479.28

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Solution

The fourth proportional to 18,850.30, 28,239.20 and 9,479.28 is: 14,200.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.30 : 28,239.20 = 9,479.28 : x
  2. Step 2: Convert to fraction form
    18,850.30/28,239.20 = 9,479.28/x
  3. Step 3: Cross multiply
    18,850.30x = 28,239.20 × 9,479.28
  4. Step 4: Simplify right side
    18,850.30x = 267,687,283.78
  5. Step 5: Solve for x
    x = 267,687,283.78/18,850.30
  6. Step 6: Final answer
    x = 14,200.69

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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.