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Finding the Fourth Proportional to 7,915.78, 11,873.73 and 4,411.12

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Solution

The fourth proportional to 7,915.78, 11,873.73 and 4,411.12 is: 6,616.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.78 : 11,873.73 = 4,411.12 : x
  2. Step 2: Convert to fraction form
    7,915.78/11,873.73 = 4,411.12/x
  3. Step 3: Cross multiply
    7,915.78x = 11,873.73 × 4,411.12
  4. Step 4: Simplify right side
    7,915.78x = 52,376,447.88
  5. Step 5: Solve for x
    x = 52,376,447.88/7,915.78
  6. Step 6: Final answer
    x = 6,616.71

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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.