Home / 28,418.97-39,217.28-15,672.69

Finding the Fourth Proportional to 28,418.97, 39,217.28 and 15,672.69

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Solution

The fourth proportional to 28,418.97, 39,217.28 and 15,672.69 is: 21,627.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,418.97 : 39,217.28 = 15,672.69 : x
  2. Step 2: Convert to fraction form
    28,418.97/39,217.28 = 15,672.69/x
  3. Step 3: Cross multiply
    28,418.97x = 39,217.28 × 15,672.69
  4. Step 4: Simplify right side
    28,418.97x = 614,640,272.08
  5. Step 5: Solve for x
    x = 614,640,272.08/28,418.97
  6. Step 6: Final answer
    x = 21,627.82

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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.