Home / 11,144.24-15,375.28-6,428.40

Finding the Fourth Proportional to 11,144.24, 15,375.28 and 6,428.40

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Solution

The fourth proportional to 11,144.24, 15,375.28 and 6,428.40 is: 8,869.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,144.24 : 15,375.28 = 6,428.40 : x
  2. Step 2: Convert to fraction form
    11,144.24/15,375.28 = 6,428.40/x
  3. Step 3: Cross multiply
    11,144.24x = 15,375.28 × 6,428.40
  4. Step 4: Simplify right side
    11,144.24x = 98,838,449.95
  5. Step 5: Solve for x
    x = 98,838,449.95/11,144.24
  6. Step 6: Final answer
    x = 8,869.02

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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.