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Finding the Fourth Proportional to 20,377.80, 30,565.44 and 7,228.44

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Solution

The fourth proportional to 20,377.80, 30,565.44 and 7,228.44 is: 10,842.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.80 : 30,565.44 = 7,228.44 : x
  2. Step 2: Convert to fraction form
    20,377.80/30,565.44 = 7,228.44/x
  3. Step 3: Cross multiply
    20,377.80x = 30,565.44 × 7,228.44
  4. Step 4: Simplify right side
    20,377.80x = 220,940,449.11
  5. Step 5: Solve for x
    x = 220,940,449.11/20,377.80
  6. Step 6: Final answer
    x = 10,842.21

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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.