Home / 20,219.80-30,329.70-18,470.20

Finding the Fourth Proportional to 20,219.80, 30,329.70 and 18,470.20

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Solution

The fourth proportional to 20,219.80, 30,329.70 and 18,470.20 is: 27,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.80 : 30,329.70 = 18,470.20 : x
  2. Step 2: Convert to fraction form
    20,219.80/30,329.70 = 18,470.20/x
  3. Step 3: Cross multiply
    20,219.80x = 30,329.70 × 18,470.20
  4. Step 4: Simplify right side
    20,219.80x = 560,195,624.94
  5. Step 5: Solve for x
    x = 560,195,624.94/20,219.80
  6. Step 6: Final answer
    x = 27,705.30

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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.