Home / 20,118.80-30,181.56-8,432.90

Finding the Fourth Proportional to 20,118.80, 30,181.56 and 8,432.90

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Solution

The fourth proportional to 20,118.80, 30,181.56 and 8,432.90 is: 12,650.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.80 : 30,181.56 = 8,432.90 : x
  2. Step 2: Convert to fraction form
    20,118.80/30,181.56 = 8,432.90/x
  3. Step 3: Cross multiply
    20,118.80x = 30,181.56 × 8,432.90
  4. Step 4: Simplify right side
    20,118.80x = 254,518,077.32
  5. Step 5: Solve for x
    x = 254,518,077.32/20,118.80
  6. Step 6: Final answer
    x = 12,650.76

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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.