Home / 7,864.56-11,789.55-2,666.79

Finding the Fourth Proportional to 7,864.56, 11,789.55 and 2,666.79

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Solution

The fourth proportional to 7,864.56, 11,789.55 and 2,666.79 is: 3,997.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,864.56 : 11,789.55 = 2,666.79 : x
  2. Step 2: Convert to fraction form
    7,864.56/11,789.55 = 2,666.79/x
  3. Step 3: Cross multiply
    7,864.56x = 11,789.55 × 2,666.79
  4. Step 4: Simplify right side
    7,864.56x = 31,440,254.04
  5. Step 5: Solve for x
    x = 31,440,254.04/7,864.56
  6. Step 6: Final answer
    x = 3,997.71

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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.