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Finding the Fourth Proportional to 18,869.97, 28,305.92 and 4,830.12

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Solution

The fourth proportional to 18,869.97, 28,305.92 and 4,830.12 is: 7,245.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.97 : 28,305.92 = 4,830.12 : x
  2. Step 2: Convert to fraction form
    18,869.97/28,305.92 = 4,830.12/x
  3. Step 3: Cross multiply
    18,869.97x = 28,305.92 × 4,830.12
  4. Step 4: Simplify right side
    18,869.97x = 136,721,002.39
  5. Step 5: Solve for x
    x = 136,721,002.39/18,869.97
  6. Step 6: Final answer
    x = 7,245.43

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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.