Home / 20,454.80-30,678.78-5,665.21

Finding the Fourth Proportional to 20,454.80, 30,678.78 and 5,665.21

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Solution

The fourth proportional to 20,454.80, 30,678.78 and 5,665.21 is: 8,496.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.80 : 30,678.78 = 5,665.21 : x
  2. Step 2: Convert to fraction form
    20,454.80/30,678.78 = 5,665.21/x
  3. Step 3: Cross multiply
    20,454.80x = 30,678.78 × 5,665.21
  4. Step 4: Simplify right side
    20,454.80x = 173,801,702.92
  5. Step 5: Solve for x
    x = 173,801,702.92/20,454.80
  6. Step 6: Final answer
    x = 8,496.87

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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.