Home / 7,686.70-11,530.15-2,139.91

Finding the Fourth Proportional to 7,686.70, 11,530.15 and 2,139.91

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Solution

The fourth proportional to 7,686.70, 11,530.15 and 2,139.91 is: 3,209.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.70 : 11,530.15 = 2,139.91 : x
  2. Step 2: Convert to fraction form
    7,686.70/11,530.15 = 2,139.91/x
  3. Step 3: Cross multiply
    7,686.70x = 11,530.15 × 2,139.91
  4. Step 4: Simplify right side
    7,686.70x = 24,673,449.11
  5. Step 5: Solve for x
    x = 24,673,449.11/7,686.70
  6. Step 6: Final answer
    x = 3,209.89

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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.