Home / 20,818.64-28,729.94-11,866.11

Finding the Fourth Proportional to 20,818.64, 28,729.94 and 11,866.11

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Solution

The fourth proportional to 20,818.64, 28,729.94 and 11,866.11 is: 16,375.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.64 : 28,729.94 = 11,866.11 : x
  2. Step 2: Convert to fraction form
    20,818.64/28,729.94 = 11,866.11/x
  3. Step 3: Cross multiply
    20,818.64x = 28,729.94 × 11,866.11
  4. Step 4: Simplify right side
    20,818.64x = 340,912,569.00
  5. Step 5: Solve for x
    x = 340,912,569.00/20,818.64
  6. Step 6: Final answer
    x = 16,375.36

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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.