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Finding the Fourth Proportional to 7,881.22, 11,823.24 and 2,616.55

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Solution

The fourth proportional to 7,881.22, 11,823.24 and 2,616.55 is: 3,925.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.22 : 11,823.24 = 2,616.55 : x
  2. Step 2: Convert to fraction form
    7,881.22/11,823.24 = 2,616.55/x
  3. Step 3: Cross multiply
    7,881.22x = 11,823.24 × 2,616.55
  4. Step 4: Simplify right side
    7,881.22x = 30,936,098.62
  5. Step 5: Solve for x
    x = 30,936,098.62/7,881.22
  6. Step 6: Final answer
    x = 3,925.29

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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.