Home / 20,766.36-31,154.46-8,287.08

Finding the Fourth Proportional to 20,766.36, 31,154.46 and 8,287.08

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Solution

The fourth proportional to 20,766.36, 31,154.46 and 8,287.08 is: 12,432.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.36 : 31,154.46 = 8,287.08 : x
  2. Step 2: Convert to fraction form
    20,766.36/31,154.46 = 8,287.08/x
  3. Step 3: Cross multiply
    20,766.36x = 31,154.46 × 8,287.08
  4. Step 4: Simplify right side
    20,766.36x = 258,179,502.38
  5. Step 5: Solve for x
    x = 258,179,502.38/20,766.36
  6. Step 6: Final answer
    x = 12,432.58

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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.