Home / 20,720.43-28,594.17-11,289

Finding the Fourth Proportional to 20,720.43, 28,594.17 and 11,289

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Solution

The fourth proportional to 20,720.43, 28,594.17 and 11,289 is: 15,578.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.43 : 28,594.17 = 11,289 : x
  2. Step 2: Convert to fraction form
    20,720.43/28,594.17 = 11,289/x
  3. Step 3: Cross multiply
    20,720.43x = 28,594.17 × 11,289
  4. Step 4: Simplify right side
    20,720.43x = 322,799,585.13
  5. Step 5: Solve for x
    x = 322,799,585.13/20,720.43
  6. Step 6: Final answer
    x = 15,578.81

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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.