Home / 10,120.25-15,169.98-3,878.57

Finding the Fourth Proportional to 10,120.25, 15,169.98 and 3,878.57

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Solution

The fourth proportional to 10,120.25, 15,169.98 and 3,878.57 is: 5,813.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.25 : 15,169.98 = 3,878.57 : x
  2. Step 2: Convert to fraction form
    10,120.25/15,169.98 = 3,878.57/x
  3. Step 3: Cross multiply
    10,120.25x = 15,169.98 × 3,878.57
  4. Step 4: Simplify right side
    10,120.25x = 58,837,881.80
  5. Step 5: Solve for x
    x = 58,837,881.80/10,120.25
  6. Step 6: Final answer
    x = 5,813.87

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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.