Home / 20,578.29-28,398.18-11,146.86

Finding the Fourth Proportional to 20,578.29, 28,398.18 and 11,146.86

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Solution

The fourth proportional to 20,578.29, 28,398.18 and 11,146.86 is: 15,382.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.29 : 28,398.18 = 11,146.86 : x
  2. Step 2: Convert to fraction form
    20,578.29/28,398.18 = 11,146.86/x
  3. Step 3: Cross multiply
    20,578.29x = 28,398.18 × 11,146.86
  4. Step 4: Simplify right side
    20,578.29x = 316,550,394.72
  5. Step 5: Solve for x
    x = 316,550,394.72/20,578.29
  6. Step 6: Final answer
    x = 15,382.73

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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.