Home / 18,819.87-28,228.92-7,723.81

Finding the Fourth Proportional to 18,819.87, 28,228.92 and 7,723.81

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Solution

The fourth proportional to 18,819.87, 28,228.92 and 7,723.81 is: 11,585.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.87 : 28,228.92 = 7,723.81 : x
  2. Step 2: Convert to fraction form
    18,819.87/28,228.92 = 7,723.81/x
  3. Step 3: Cross multiply
    18,819.87x = 28,228.92 × 7,723.81
  4. Step 4: Simplify right side
    18,819.87x = 218,034,814.59
  5. Step 5: Solve for x
    x = 218,034,814.59/18,819.87
  6. Step 6: Final answer
    x = 11,585.35

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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.