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Finding the Fourth Proportional to 18,871.55, 28,310.00 and 6,395.13

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Solution

The fourth proportional to 18,871.55, 28,310.00 and 6,395.13 is: 9,593.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.55 : 28,310.00 = 6,395.13 : x
  2. Step 2: Convert to fraction form
    18,871.55/28,310.00 = 6,395.13/x
  3. Step 3: Cross multiply
    18,871.55x = 28,310.00 × 6,395.13
  4. Step 4: Simplify right side
    18,871.55x = 181,046,098.32
  5. Step 5: Solve for x
    x = 181,046,098.32/18,871.55
  6. Step 6: Final answer
    x = 9,593.60

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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.