Home / 20,731.14-28,608.80-11,299.50

Finding the Fourth Proportional to 20,731.14, 28,608.80 and 11,299.50

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Solution

The fourth proportional to 20,731.14, 28,608.80 and 11,299.50 is: 15,593.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.14 : 28,608.80 = 11,299.50 : x
  2. Step 2: Convert to fraction form
    20,731.14/28,608.80 = 11,299.50/x
  3. Step 3: Cross multiply
    20,731.14x = 28,608.80 × 11,299.50
  4. Step 4: Simplify right side
    20,731.14x = 323,265,079.10
  5. Step 5: Solve for x
    x = 323,265,079.10/20,731.14
  6. Step 6: Final answer
    x = 15,593.21

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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.