Home / 20,685.12-31,020.89-6,641.82

Finding the Fourth Proportional to 20,685.12, 31,020.89 and 6,641.82

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Solution

The fourth proportional to 20,685.12, 31,020.89 and 6,641.82 is: 9,960.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.12 : 31,020.89 = 6,641.82 : x
  2. Step 2: Convert to fraction form
    20,685.12/31,020.89 = 6,641.82/x
  3. Step 3: Cross multiply
    20,685.12x = 31,020.89 × 6,641.82
  4. Step 4: Simplify right side
    20,685.12x = 206,035,034.69
  5. Step 5: Solve for x
    x = 206,035,034.69/20,685.12
  6. Step 6: Final answer
    x = 9,960.54

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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.