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Finding the Fourth Proportional to 25,878.38, 38,817.57 and 20,659.82

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Solution

The fourth proportional to 25,878.38, 38,817.57 and 20,659.82 is: 30,989.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,878.38 : 38,817.57 = 20,659.82 : x
  2. Step 2: Convert to fraction form
    25,878.38/38,817.57 = 20,659.82/x
  3. Step 3: Cross multiply
    25,878.38x = 38,817.57 × 20,659.82
  4. Step 4: Simplify right side
    25,878.38x = 801,964,009.04
  5. Step 5: Solve for x
    x = 801,964,009.04/25,878.38
  6. Step 6: Final answer
    x = 30,989.73

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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.