Home / 10,815.60-16,222.06-2,918.76

Finding the Fourth Proportional to 10,815.60, 16,222.06 and 2,918.76

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Solution

The fourth proportional to 10,815.60, 16,222.06 and 2,918.76 is: 4,377.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.60 : 16,222.06 = 2,918.76 : x
  2. Step 2: Convert to fraction form
    10,815.60/16,222.06 = 2,918.76/x
  3. Step 3: Cross multiply
    10,815.60x = 16,222.06 × 2,918.76
  4. Step 4: Simplify right side
    10,815.60x = 47,348,299.85
  5. Step 5: Solve for x
    x = 47,348,299.85/10,815.60
  6. Step 6: Final answer
    x = 4,377.78

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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.