Home / 13,687.02-18,884.52-8,379.90

Finding the Fourth Proportional to 13,687.02, 18,884.52 and 8,379.90

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Solution

The fourth proportional to 13,687.02, 18,884.52 and 8,379.90 is: 11,562.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.02 : 18,884.52 = 8,379.90 : x
  2. Step 2: Convert to fraction form
    13,687.02/18,884.52 = 8,379.90/x
  3. Step 3: Cross multiply
    13,687.02x = 18,884.52 × 8,379.90
  4. Step 4: Simplify right side
    13,687.02x = 158,250,389.15
  5. Step 5: Solve for x
    x = 158,250,389.15/13,687.02
  6. Step 6: Final answer
    x = 11,562.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.