Home / 10,538.78-15,811.07-3,143.48

Finding the Fourth Proportional to 10,538.78, 15,811.07 and 3,143.48

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Solution

The fourth proportional to 10,538.78, 15,811.07 and 3,143.48 is: 4,716.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,538.78 : 15,811.07 = 3,143.48 : x
  2. Step 2: Convert to fraction form
    10,538.78/15,811.07 = 3,143.48/x
  3. Step 3: Cross multiply
    10,538.78x = 15,811.07 × 3,143.48
  4. Step 4: Simplify right side
    10,538.78x = 49,701,687.55
  5. Step 5: Solve for x
    x = 49,701,687.55/10,538.78
  6. Step 6: Final answer
    x = 4,716.08

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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.