Home / 10,561.50-15,842.48-3,990.78

Finding the Fourth Proportional to 10,561.50, 15,842.48 and 3,990.78

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Solution

The fourth proportional to 10,561.50, 15,842.48 and 3,990.78 is: 5,986.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,561.50 : 15,842.48 = 3,990.78 : x
  2. Step 2: Convert to fraction form
    10,561.50/15,842.48 = 3,990.78/x
  3. Step 3: Cross multiply
    10,561.50x = 15,842.48 × 3,990.78
  4. Step 4: Simplify right side
    10,561.50x = 63,223,832.38
  5. Step 5: Solve for x
    x = 63,223,832.38/10,561.50
  6. Step 6: Final answer
    x = 5,986.26

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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.