Home / 25,705.20-38,521.80-20,449.20

Finding the Fourth Proportional to 25,705.20, 38,521.80 and 20,449.20

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Solution

The fourth proportional to 25,705.20, 38,521.80 and 20,449.20 is: 30,645.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,705.20 : 38,521.80 = 20,449.20 : x
  2. Step 2: Convert to fraction form
    25,705.20/38,521.80 = 20,449.20/x
  3. Step 3: Cross multiply
    25,705.20x = 38,521.80 × 20,449.20
  4. Step 4: Simplify right side
    25,705.20x = 787,739,992.56
  5. Step 5: Solve for x
    x = 787,739,992.56/25,705.20
  6. Step 6: Final answer
    x = 30,645.16

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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.