Home / 20,578.59-28,398.45-11,147.15

Finding the Fourth Proportional to 20,578.59, 28,398.45 and 11,147.15

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Solution

The fourth proportional to 20,578.59, 28,398.45 and 11,147.15 is: 15,383.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.59 : 28,398.45 = 11,147.15 : x
  2. Step 2: Convert to fraction form
    20,578.59/28,398.45 = 11,147.15/x
  3. Step 3: Cross multiply
    20,578.59x = 28,398.45 × 11,147.15
  4. Step 4: Simplify right side
    20,578.59x = 316,561,584.19
  5. Step 5: Solve for x
    x = 316,561,584.19/20,578.59
  6. Step 6: Final answer
    x = 15,383.06

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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.