Home / 25,432.80-38,149.20-20,512.05

Finding the Fourth Proportional to 25,432.80, 38,149.20 and 20,512.05

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Solution

The fourth proportional to 25,432.80, 38,149.20 and 20,512.05 is: 30,768.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,432.80 : 38,149.20 = 20,512.05 : x
  2. Step 2: Convert to fraction form
    25,432.80/38,149.20 = 20,512.05/x
  3. Step 3: Cross multiply
    25,432.80x = 38,149.20 × 20,512.05
  4. Step 4: Simplify right side
    25,432.80x = 782,518,297.86
  5. Step 5: Solve for x
    x = 782,518,297.86/25,432.80
  6. Step 6: Final answer
    x = 30,768.08

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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.