Home / 11,156.20-15,395.40-6,442

Finding the Fourth Proportional to 11,156.20, 15,395.40 and 6,442

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Solution

The fourth proportional to 11,156.20, 15,395.40 and 6,442 is: 8,889.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,156.20 : 15,395.40 = 6,442 : x
  2. Step 2: Convert to fraction form
    11,156.20/15,395.40 = 6,442/x
  3. Step 3: Cross multiply
    11,156.20x = 15,395.40 × 6,442
  4. Step 4: Simplify right side
    11,156.20x = 99,177,166.80
  5. Step 5: Solve for x
    x = 99,177,166.80/11,156.20
  6. Step 6: Final answer
    x = 8,889.87

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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.