Home / 10,129.71-15,189.85-3,107.92

Finding the Fourth Proportional to 10,129.71, 15,189.85 and 3,107.92

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Solution

The fourth proportional to 10,129.71, 15,189.85 and 3,107.92 is: 4,660.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.71 : 15,189.85 = 3,107.92 : x
  2. Step 2: Convert to fraction form
    10,129.71/15,189.85 = 3,107.92/x
  3. Step 3: Cross multiply
    10,129.71x = 15,189.85 × 3,107.92
  4. Step 4: Simplify right side
    10,129.71x = 47,208,747.12
  5. Step 5: Solve for x
    x = 47,208,747.12/10,129.71
  6. Step 6: Final answer
    x = 4,660.42

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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.