Home / 13,281.11-18,321.78-8,566.91

Finding the Fourth Proportional to 13,281.11, 18,321.78 and 8,566.91

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Solution

The fourth proportional to 13,281.11, 18,321.78 and 8,566.91 is: 11,818.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.11 : 18,321.78 = 8,566.91 : x
  2. Step 2: Convert to fraction form
    13,281.11/18,321.78 = 8,566.91/x
  3. Step 3: Cross multiply
    13,281.11x = 18,321.78 × 8,566.91
  4. Step 4: Simplify right side
    13,281.11x = 156,961,040.30
  5. Step 5: Solve for x
    x = 156,961,040.30/13,281.11
  6. Step 6: Final answer
    x = 11,818.37

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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.