Home / 20,426.87-28,189.81-11,474.18

Finding the Fourth Proportional to 20,426.87, 28,189.81 and 11,474.18

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Solution

The fourth proportional to 20,426.87, 28,189.81 and 11,474.18 is: 15,834.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.87 : 28,189.81 = 11,474.18 : x
  2. Step 2: Convert to fraction form
    20,426.87/28,189.81 = 11,474.18/x
  3. Step 3: Cross multiply
    20,426.87x = 28,189.81 × 11,474.18
  4. Step 4: Simplify right side
    20,426.87x = 323,454,933.21
  5. Step 5: Solve for x
    x = 323,454,933.21/20,426.87
  6. Step 6: Final answer
    x = 15,834.78

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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.