Home / 28,067.18-38,732.68-15,491.90

Finding the Fourth Proportional to 28,067.18, 38,732.68 and 15,491.90

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Solution

The fourth proportional to 28,067.18, 38,732.68 and 15,491.90 is: 21,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,067.18 : 38,732.68 = 15,491.90 : x
  2. Step 2: Convert to fraction form
    28,067.18/38,732.68 = 15,491.90/x
  3. Step 3: Cross multiply
    28,067.18x = 38,732.68 × 15,491.90
  4. Step 4: Simplify right side
    28,067.18x = 600,042,572.90
  5. Step 5: Solve for x
    x = 600,042,572.90/28,067.18
  6. Step 6: Final answer
    x = 21,378.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.