Home / 10,961.68-15,131.04-6,489.28

Finding the Fourth Proportional to 10,961.68, 15,131.04 and 6,489.28

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Solution

The fourth proportional to 10,961.68, 15,131.04 and 6,489.28 is: 8,957.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.68 : 15,131.04 = 6,489.28 : x
  2. Step 2: Convert to fraction form
    10,961.68/15,131.04 = 6,489.28/x
  3. Step 3: Cross multiply
    10,961.68x = 15,131.04 × 6,489.28
  4. Step 4: Simplify right side
    10,961.68x = 98,189,555.25
  5. Step 5: Solve for x
    x = 98,189,555.25/10,961.68
  6. Step 6: Final answer
    x = 8,957.53

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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.