Home / 10,916.25-16,374.38-3,990.75

Finding the Fourth Proportional to 10,916.25, 16,374.38 and 3,990.75

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Solution

The fourth proportional to 10,916.25, 16,374.38 and 3,990.75 is: 5,986.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916.25 : 16,374.38 = 3,990.75 : x
  2. Step 2: Convert to fraction form
    10,916.25/16,374.38 = 3,990.75/x
  3. Step 3: Cross multiply
    10,916.25x = 16,374.38 × 3,990.75
  4. Step 4: Simplify right side
    10,916.25x = 65,346,037.03
  5. Step 5: Solve for x
    x = 65,346,037.03/10,916.25
  6. Step 6: Final answer
    x = 5,986.13

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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.