Home / 18,816.20-28,221.68-13,176.78

Finding the Fourth Proportional to 18,816.20, 28,221.68 and 13,176.78

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Solution

The fourth proportional to 18,816.20, 28,221.68 and 13,176.78 is: 19,763.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.20 : 28,221.68 = 13,176.78 : x
  2. Step 2: Convert to fraction form
    18,816.20/28,221.68 = 13,176.78/x
  3. Step 3: Cross multiply
    18,816.20x = 28,221.68 × 13,176.78
  4. Step 4: Simplify right side
    18,816.20x = 371,870,868.59
  5. Step 5: Solve for x
    x = 371,870,868.59/18,816.20
  6. Step 6: Final answer
    x = 19,763.34

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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.