Home / 18,691.40-28,032.30-5,540.69

Finding the Fourth Proportional to 18,691.40, 28,032.30 and 5,540.69

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Solution

The fourth proportional to 18,691.40, 28,032.30 and 5,540.69 is: 8,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.40 : 28,032.30 = 5,540.69 : x
  2. Step 2: Convert to fraction form
    18,691.40/28,032.30 = 5,540.69/x
  3. Step 3: Cross multiply
    18,691.40x = 28,032.30 × 5,540.69
  4. Step 4: Simplify right side
    18,691.40x = 155,318,354.37
  5. Step 5: Solve for x
    x = 155,318,354.37/18,691.40
  6. Step 6: Final answer
    x = 8,309.61

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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.