Home / 20,864.75-31,275.25-7,708.73

Finding the Fourth Proportional to 20,864.75, 31,275.25 and 7,708.73

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Solution

The fourth proportional to 20,864.75, 31,275.25 and 7,708.73 is: 11,555.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.75 : 31,275.25 = 7,708.73 : x
  2. Step 2: Convert to fraction form
    20,864.75/31,275.25 = 7,708.73/x
  3. Step 3: Cross multiply
    20,864.75x = 31,275.25 × 7,708.73
  4. Step 4: Simplify right side
    20,864.75x = 241,092,282.28
  5. Step 5: Solve for x
    x = 241,092,282.28/20,864.75
  6. Step 6: Final answer
    x = 11,555.01

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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.