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Finding the Fourth Proportional to 7,881.72, 11,822.58 and 7,487.55

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Solution

The fourth proportional to 7,881.72, 11,822.58 and 7,487.55 is: 11,231.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.72 : 11,822.58 = 7,487.55 : x
  2. Step 2: Convert to fraction form
    7,881.72/11,822.58 = 7,487.55/x
  3. Step 3: Cross multiply
    7,881.72x = 11,822.58 × 7,487.55
  4. Step 4: Simplify right side
    7,881.72x = 88,522,158.88
  5. Step 5: Solve for x
    x = 88,522,158.88/7,881.72
  6. Step 6: Final answer
    x = 11,231.33

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Similar ratio
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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.