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Finding the Fourth Proportional to 25,633.80, 38,450.70 and 20,104.20

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Solution

The fourth proportional to 25,633.80, 38,450.70 and 20,104.20 is: 30,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,633.80 : 38,450.70 = 20,104.20 : x
  2. Step 2: Convert to fraction form
    25,633.80/38,450.70 = 20,104.20/x
  3. Step 3: Cross multiply
    25,633.80x = 38,450.70 × 20,104.20
  4. Step 4: Simplify right side
    25,633.80x = 773,020,562.94
  5. Step 5: Solve for x
    x = 773,020,562.94/25,633.80
  6. Step 6: Final answer
    x = 30,156.30

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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.