Home / 20,778.11-31,167.20-8,299.14

Finding the Fourth Proportional to 20,778.11, 31,167.20 and 8,299.14

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Solution

The fourth proportional to 20,778.11, 31,167.20 and 8,299.14 is: 12,448.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.11 : 31,167.20 = 8,299.14 : x
  2. Step 2: Convert to fraction form
    20,778.11/31,167.20 = 8,299.14/x
  3. Step 3: Cross multiply
    20,778.11x = 31,167.20 × 8,299.14
  4. Step 4: Simplify right side
    20,778.11x = 258,660,914.71
  5. Step 5: Solve for x
    x = 258,660,914.71/20,778.11
  6. Step 6: Final answer
    x = 12,448.72

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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.