Home / 20,578.68-28,397.94-11,503.82

Finding the Fourth Proportional to 20,578.68, 28,397.94 and 11,503.82

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Solution

The fourth proportional to 20,578.68, 28,397.94 and 11,503.82 is: 15,874.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.68 : 28,397.94 = 11,503.82 : x
  2. Step 2: Convert to fraction form
    20,578.68/28,397.94 = 11,503.82/x
  3. Step 3: Cross multiply
    20,578.68x = 28,397.94 × 11,503.82
  4. Step 4: Simplify right side
    20,578.68x = 326,684,648.14
  5. Step 5: Solve for x
    x = 326,684,648.14/20,578.68
  6. Step 6: Final answer
    x = 15,874.91

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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.