Home / 10,431.91-15,647.87-2,640.72

Finding the Fourth Proportional to 10,431.91, 15,647.87 and 2,640.72

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Solution

The fourth proportional to 10,431.91, 15,647.87 and 2,640.72 is: 3,961.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,431.91 : 15,647.87 = 2,640.72 : x
  2. Step 2: Convert to fraction form
    10,431.91/15,647.87 = 2,640.72/x
  3. Step 3: Cross multiply
    10,431.91x = 15,647.87 × 2,640.72
  4. Step 4: Simplify right side
    10,431.91x = 41,321,649.87
  5. Step 5: Solve for x
    x = 41,321,649.87/10,431.91
  6. Step 6: Final answer
    x = 3,961.08

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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.