Home / 7,686.56-11,529.31-2,139.79

Finding the Fourth Proportional to 7,686.56, 11,529.31 and 2,139.79

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Solution

The fourth proportional to 7,686.56, 11,529.31 and 2,139.79 is: 3,209.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.56 : 11,529.31 = 2,139.79 : x
  2. Step 2: Convert to fraction form
    7,686.56/11,529.31 = 2,139.79/x
  3. Step 3: Cross multiply
    7,686.56x = 11,529.31 × 2,139.79
  4. Step 4: Simplify right side
    7,686.56x = 24,670,302.24
  5. Step 5: Solve for x
    x = 24,670,302.24/7,686.56
  6. Step 6: Final answer
    x = 3,209.54

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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.