Home / 20,800.11-31,177.68-8,306.40

Finding the Fourth Proportional to 20,800.11, 31,177.68 and 8,306.40

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Solution

The fourth proportional to 20,800.11, 31,177.68 and 8,306.40 is: 12,450.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.11 : 31,177.68 = 8,306.40 : x
  2. Step 2: Convert to fraction form
    20,800.11/31,177.68 = 8,306.40/x
  3. Step 3: Cross multiply
    20,800.11x = 31,177.68 × 8,306.40
  4. Step 4: Simplify right side
    20,800.11x = 258,974,281.15
  5. Step 5: Solve for x
    x = 258,974,281.15/20,800.11
  6. Step 6: Final answer
    x = 12,450.62

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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.