Home / 10,142.25-15,139.95-8,764.44

Finding the Fourth Proportional to 10,142.25, 15,139.95 and 8,764.44

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Solution

The fourth proportional to 10,142.25, 15,139.95 and 8,764.44 is: 13,083.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,142.25 : 15,139.95 = 8,764.44 : x
  2. Step 2: Convert to fraction form
    10,142.25/15,139.95 = 8,764.44/x
  3. Step 3: Cross multiply
    10,142.25x = 15,139.95 × 8,764.44
  4. Step 4: Simplify right side
    10,142.25x = 132,693,183.38
  5. Step 5: Solve for x
    x = 132,693,183.38/10,142.25
  6. Step 6: Final answer
    x = 13,083.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.