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Finding the Fourth Proportional to 18,842.97, 28,249.39 and 9,478.15

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Solution

The fourth proportional to 18,842.97, 28,249.39 and 9,478.15 is: 14,209.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.97 : 28,249.39 = 9,478.15 : x
  2. Step 2: Convert to fraction form
    18,842.97/28,249.39 = 9,478.15/x
  3. Step 3: Cross multiply
    18,842.97x = 28,249.39 × 9,478.15
  4. Step 4: Simplify right side
    18,842.97x = 267,751,955.83
  5. Step 5: Solve for x
    x = 267,751,955.83/18,842.97
  6. Step 6: Final answer
    x = 14,209.65

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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.