Home / 28,538.20-39,382.76-15,791.92

Finding the Fourth Proportional to 28,538.20, 39,382.76 and 15,791.92

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Solution

The fourth proportional to 28,538.20, 39,382.76 and 15,791.92 is: 21,792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.20 : 39,382.76 = 15,791.92 : x
  2. Step 2: Convert to fraction form
    28,538.20/39,382.76 = 15,791.92/x
  3. Step 3: Cross multiply
    28,538.20x = 39,382.76 × 15,791.92
  4. Step 4: Simplify right side
    28,538.20x = 621,929,277.10
  5. Step 5: Solve for x
    x = 621,929,277.10/28,538.20
  6. Step 6: Final answer
    x = 21,792.87

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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.