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Finding the Fourth Proportional to 8,615.22, 12,927.69 and 4,915.14

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Solution

The fourth proportional to 8,615.22, 12,927.69 and 4,915.14 is: 7,375.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.22 : 12,927.69 = 4,915.14 : x
  2. Step 2: Convert to fraction form
    8,615.22/12,927.69 = 4,915.14/x
  3. Step 3: Cross multiply
    8,615.22x = 12,927.69 × 4,915.14
  4. Step 4: Simplify right side
    8,615.22x = 63,541,406.23
  5. Step 5: Solve for x
    x = 63,541,406.23/8,615.22
  6. Step 6: Final answer
    x = 7,375.48

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1.5x scale

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.