Home / 20,891.18-28,829.91-11,331.14

Finding the Fourth Proportional to 20,891.18, 28,829.91 and 11,331.14

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Solution

The fourth proportional to 20,891.18, 28,829.91 and 11,331.14 is: 15,637.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.18 : 28,829.91 = 11,331.14 : x
  2. Step 2: Convert to fraction form
    20,891.18/28,829.91 = 11,331.14/x
  3. Step 3: Cross multiply
    20,891.18x = 28,829.91 × 11,331.14
  4. Step 4: Simplify right side
    20,891.18x = 326,675,746.40
  5. Step 5: Solve for x
    x = 326,675,746.40/20,891.18
  6. Step 6: Final answer
    x = 15,637.02

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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.