Home / 20,693.92-31,020.64-8,209.76

Finding the Fourth Proportional to 20,693.92, 31,020.64 and 8,209.76

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Solution

The fourth proportional to 20,693.92, 31,020.64 and 8,209.76 is: 12,306.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693.92 : 31,020.64 = 8,209.76 : x
  2. Step 2: Convert to fraction form
    20,693.92/31,020.64 = 8,209.76/x
  3. Step 3: Cross multiply
    20,693.92x = 31,020.64 × 8,209.76
  4. Step 4: Simplify right side
    20,693.92x = 254,672,009.45
  5. Step 5: Solve for x
    x = 254,672,009.45/20,693.92
  6. Step 6: Final answer
    x = 12,306.61

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1.5x scale

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.