Home / 10,231.18-15,339.99-3,991.78

Finding the Fourth Proportional to 10,231.18, 15,339.99 and 3,991.78

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Solution

The fourth proportional to 10,231.18, 15,339.99 and 3,991.78 is: 5,985.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,231.18 : 15,339.99 = 3,991.78 : x
  2. Step 2: Convert to fraction form
    10,231.18/15,339.99 = 3,991.78/x
  3. Step 3: Cross multiply
    10,231.18x = 15,339.99 × 3,991.78
  4. Step 4: Simplify right side
    10,231.18x = 61,233,865.28
  5. Step 5: Solve for x
    x = 61,233,865.28/10,231.18
  6. Step 6: Final answer
    x = 5,985.02

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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.