Home / 7,789.71-11,689.17-3,111.92

Finding the Fourth Proportional to 7,789.71, 11,689.17 and 3,111.92

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Solution

The fourth proportional to 7,789.71, 11,689.17 and 3,111.92 is: 4,669.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,789.71 : 11,689.17 = 3,111.92 : x
  2. Step 2: Convert to fraction form
    7,789.71/11,689.17 = 3,111.92/x
  3. Step 3: Cross multiply
    7,789.71x = 11,689.17 × 3,111.92
  4. Step 4: Simplify right side
    7,789.71x = 36,375,757.51
  5. Step 5: Solve for x
    x = 36,375,757.51/7,789.71
  6. Step 6: Final answer
    x = 4,669.72

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1.5x scale

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.