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Finding the Fourth Proportional to 8,691.10, 11,994.96 and 4,915.42

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Solution

The fourth proportional to 8,691.10, 11,994.96 and 4,915.42 is: 6,783.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.10 : 11,994.96 = 4,915.42 : x
  2. Step 2: Convert to fraction form
    8,691.10/11,994.96 = 4,915.42/x
  3. Step 3: Cross multiply
    8,691.10x = 11,994.96 × 4,915.42
  4. Step 4: Simplify right side
    8,691.10x = 58,960,266.28
  5. Step 5: Solve for x
    x = 58,960,266.28/8,691.10
  6. Step 6: Final answer
    x = 6,783.98

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1.5x scale

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.