Home / 20,791.24-28,681.92-15,117.20

Finding the Fourth Proportional to 20,791.24, 28,681.92 and 15,117.20

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Solution

The fourth proportional to 20,791.24, 28,681.92 and 15,117.20 is: 20,854.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.24 : 28,681.92 = 15,117.20 : x
  2. Step 2: Convert to fraction form
    20,791.24/28,681.92 = 15,117.20/x
  3. Step 3: Cross multiply
    20,791.24x = 28,681.92 × 15,117.20
  4. Step 4: Simplify right side
    20,791.24x = 433,590,321.02
  5. Step 5: Solve for x
    x = 433,590,321.02/20,791.24
  6. Step 6: Final answer
    x = 20,854.47

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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.