Home / 11,121.28-15,348.72-6,342.40

Finding the Fourth Proportional to 11,121.28, 15,348.72 and 6,342.40

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Solution

The fourth proportional to 11,121.28, 15,348.72 and 6,342.40 is: 8,753.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.28 : 15,348.72 = 6,342.40 : x
  2. Step 2: Convert to fraction form
    11,121.28/15,348.72 = 6,342.40/x
  3. Step 3: Cross multiply
    11,121.28x = 15,348.72 × 6,342.40
  4. Step 4: Simplify right side
    11,121.28x = 97,347,721.73
  5. Step 5: Solve for x
    x = 97,347,721.73/11,121.28
  6. Step 6: Final answer
    x = 8,753.28

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1.5x scale

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.