Home / 20,371.20-28,113.41-15,326.38

Finding the Fourth Proportional to 20,371.20, 28,113.41 and 15,326.38

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Solution

The fourth proportional to 20,371.20, 28,113.41 and 15,326.38 is: 21,151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.20 : 28,113.41 = 15,326.38 : x
  2. Step 2: Convert to fraction form
    20,371.20/28,113.41 = 15,326.38/x
  3. Step 3: Cross multiply
    20,371.20x = 28,113.41 × 15,326.38
  4. Step 4: Simplify right side
    20,371.20x = 430,876,878.21
  5. Step 5: Solve for x
    x = 430,876,878.21/20,371.20
  6. Step 6: Final answer
    x = 21,151.28

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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.