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Finding the Fourth Proportional to 8,915.76, 13,360.68 and 4,531.68

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Solution

The fourth proportional to 8,915.76, 13,360.68 and 4,531.68 is: 6,790.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.76 : 13,360.68 = 4,531.68 : x
  2. Step 2: Convert to fraction form
    8,915.76/13,360.68 = 4,531.68/x
  3. Step 3: Cross multiply
    8,915.76x = 13,360.68 × 4,531.68
  4. Step 4: Simplify right side
    8,915.76x = 60,546,326.34
  5. Step 5: Solve for x
    x = 60,546,326.34/8,915.76
  6. Step 6: Final answer
    x = 6,790.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.