Home / 18,815.80-28,221.72-7,723.66

Finding the Fourth Proportional to 18,815.80, 28,221.72 and 7,723.66

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Solution

The fourth proportional to 18,815.80, 28,221.72 and 7,723.66 is: 11,584.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.80 : 28,221.72 = 7,723.66 : x
  2. Step 2: Convert to fraction form
    18,815.80/28,221.72 = 7,723.66/x
  3. Step 3: Cross multiply
    18,815.80x = 28,221.72 × 7,723.66
  4. Step 4: Simplify right side
    18,815.80x = 217,974,969.90
  5. Step 5: Solve for x
    x = 217,974,969.90/18,815.80
  6. Step 6: Final answer
    x = 11,584.68

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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.