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Finding the Fourth Proportional to 5,103.76, 7,659 and 1,816.80

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Solution

The fourth proportional to 5,103.76, 7,659 and 1,816.80 is: 2,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,103.76 : 7,659 = 1,816.80 : x
  2. Step 2: Convert to fraction form
    5,103.76/7,659 = 1,816.80/x
  3. Step 3: Cross multiply
    5,103.76x = 7,659 × 1,816.80
  4. Step 4: Simplify right side
    5,103.76x = 13,914,871.20
  5. Step 5: Solve for x
    x = 13,914,871.20/5,103.76
  6. Step 6: Final answer
    x = 2,726.40

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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.