Home / 10,918.97-16,378.40-3,127.78

Finding the Fourth Proportional to 10,918.97, 16,378.40 and 3,127.78

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Solution

The fourth proportional to 10,918.97, 16,378.40 and 3,127.78 is: 4,691.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.97 : 16,378.40 = 3,127.78 : x
  2. Step 2: Convert to fraction form
    10,918.97/16,378.40 = 3,127.78/x
  3. Step 3: Cross multiply
    10,918.97x = 16,378.40 × 3,127.78
  4. Step 4: Simplify right side
    10,918.97x = 51,228,031.95
  5. Step 5: Solve for x
    x = 51,228,031.95/10,918.97
  6. Step 6: Final answer
    x = 4,691.65

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1.5x scale

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.