Home / 10,916.97-16,375.40-3,125.78

Finding the Fourth Proportional to 10,916.97, 16,375.40 and 3,125.78

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Solution

The fourth proportional to 10,916.97, 16,375.40 and 3,125.78 is: 4,688.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916.97 : 16,375.40 = 3,125.78 : x
  2. Step 2: Convert to fraction form
    10,916.97/16,375.40 = 3,125.78/x
  3. Step 3: Cross multiply
    10,916.97x = 16,375.40 × 3,125.78
  4. Step 4: Simplify right side
    10,916.97x = 51,185,897.81
  5. Step 5: Solve for x
    x = 51,185,897.81/10,916.97
  6. Step 6: Final answer
    x = 4,688.66

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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.