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Finding the Fourth Proportional to 12,915.44, 19,392.60 and 7,375.04

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Solution

The fourth proportional to 12,915.44, 19,392.60 and 7,375.04 is: 11,073.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.44 : 19,392.60 = 7,375.04 : x
  2. Step 2: Convert to fraction form
    12,915.44/19,392.60 = 7,375.04/x
  3. Step 3: Cross multiply
    12,915.44x = 19,392.60 × 7,375.04
  4. Step 4: Simplify right side
    12,915.44x = 143,021,200.70
  5. Step 5: Solve for x
    x = 143,021,200.70/12,915.44
  6. Step 6: Final answer
    x = 11,073.66

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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.