Home / 20,578.24-28,397.88-11,146.72

Finding the Fourth Proportional to 20,578.24, 28,397.88 and 11,146.72

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Solution

The fourth proportional to 20,578.24, 28,397.88 and 11,146.72 is: 15,382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.24 : 28,397.88 = 11,146.72 : x
  2. Step 2: Convert to fraction form
    20,578.24/28,397.88 = 11,146.72/x
  3. Step 3: Cross multiply
    20,578.24x = 28,397.88 × 11,146.72
  4. Step 4: Simplify right side
    20,578.24x = 316,543,216.95
  5. Step 5: Solve for x
    x = 316,543,216.95/20,578.24
  6. Step 6: Final answer
    x = 15,382.42

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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.