Home / 10,918.79-16,375.35-3,125.78

Finding the Fourth Proportional to 10,918.79, 16,375.35 and 3,125.78

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Solution

The fourth proportional to 10,918.79, 16,375.35 and 3,125.78 is: 4,687.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.79 : 16,375.35 = 3,125.78 : x
  2. Step 2: Convert to fraction form
    10,918.79/16,375.35 = 3,125.78/x
  3. Step 3: Cross multiply
    10,918.79x = 16,375.35 × 3,125.78
  4. Step 4: Simplify right side
    10,918.79x = 51,185,741.52
  5. Step 5: Solve for x
    x = 51,185,741.52/10,918.79
  6. Step 6: Final answer
    x = 4,687.86

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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.