Home / 11,278.98-16,918.40-8,815.88

Finding the Fourth Proportional to 11,278.98, 16,918.40 and 8,815.88

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Solution

The fourth proportional to 11,278.98, 16,918.40 and 8,815.88 is: 13,223.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.98 : 16,918.40 = 8,815.88 : x
  2. Step 2: Convert to fraction form
    11,278.98/16,918.40 = 8,815.88/x
  3. Step 3: Cross multiply
    11,278.98x = 16,918.40 × 8,815.88
  4. Step 4: Simplify right side
    11,278.98x = 149,150,488.58
  5. Step 5: Solve for x
    x = 149,150,488.58/11,278.98
  6. Step 6: Final answer
    x = 13,223.75

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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.