Home / 20,435.18-30,640.46-13,324.70

Finding the Fourth Proportional to 20,435.18, 30,640.46 and 13,324.70

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Solution

The fourth proportional to 20,435.18, 30,640.46 and 13,324.70 is: 19,979.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.18 : 30,640.46 = 13,324.70 : x
  2. Step 2: Convert to fraction form
    20,435.18/30,640.46 = 13,324.70/x
  3. Step 3: Cross multiply
    20,435.18x = 30,640.46 × 13,324.70
  4. Step 4: Simplify right side
    20,435.18x = 408,274,947.34
  5. Step 5: Solve for x
    x = 408,274,947.34/20,435.18
  6. Step 6: Final answer
    x = 19,979.03

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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.