Home / 20,664.70-28,517.40-12,167.19

Finding the Fourth Proportional to 20,664.70, 28,517.40 and 12,167.19

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Solution

The fourth proportional to 20,664.70, 28,517.40 and 12,167.19 is: 16,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.70 : 28,517.40 = 12,167.19 : x
  2. Step 2: Convert to fraction form
    20,664.70/28,517.40 = 12,167.19/x
  3. Step 3: Cross multiply
    20,664.70x = 28,517.40 × 12,167.19
  4. Step 4: Simplify right side
    20,664.70x = 346,976,624.11
  5. Step 5: Solve for x
    x = 346,976,624.11/20,664.70
  6. Step 6: Final answer
    x = 16,790.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.