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Finding the Fourth Proportional to 5,105.84, 7,651.20 and 2,913.44

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Solution

The fourth proportional to 5,105.84, 7,651.20 and 2,913.44 is: 4,365.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.84 : 7,651.20 = 2,913.44 : x
  2. Step 2: Convert to fraction form
    5,105.84/7,651.20 = 2,913.44/x
  3. Step 3: Cross multiply
    5,105.84x = 7,651.20 × 2,913.44
  4. Step 4: Simplify right side
    5,105.84x = 22,291,312.13
  5. Step 5: Solve for x
    x = 22,291,312.13/5,105.84
  6. Step 6: Final answer
    x = 4,365.85

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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.