Home / 11,257.28-15,531.84-7,721.60

Finding the Fourth Proportional to 11,257.28, 15,531.84 and 7,721.60

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Solution

The fourth proportional to 11,257.28, 15,531.84 and 7,721.60 is: 10,653.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,257.28 : 15,531.84 = 7,721.60 : x
  2. Step 2: Convert to fraction form
    11,257.28/15,531.84 = 7,721.60/x
  3. Step 3: Cross multiply
    11,257.28x = 15,531.84 × 7,721.60
  4. Step 4: Simplify right side
    11,257.28x = 119,930,655.74
  5. Step 5: Solve for x
    x = 119,930,655.74/11,257.28
  6. Step 6: Final answer
    x = 10,653.61

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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.