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Finding the Fourth Proportional to 25,969.60, 38,992.80 and 20,132.80

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Solution

The fourth proportional to 25,969.60, 38,992.80 and 20,132.80 is: 30,228.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,969.60 : 38,992.80 = 20,132.80 : x
  2. Step 2: Convert to fraction form
    25,969.60/38,992.80 = 20,132.80/x
  3. Step 3: Cross multiply
    25,969.60x = 38,992.80 × 20,132.80
  4. Step 4: Simplify right side
    25,969.60x = 785,034,243.84
  5. Step 5: Solve for x
    x = 785,034,243.84/25,969.60
  6. Step 6: Final answer
    x = 30,228.97

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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.