Home / 28,181.20-42,255.60-8,456.80

Finding the Fourth Proportional to 28,181.20, 42,255.60 and 8,456.80

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Solution

The fourth proportional to 28,181.20, 42,255.60 and 8,456.80 is: 12,680.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.20 : 42,255.60 = 8,456.80 : x
  2. Step 2: Convert to fraction form
    28,181.20/42,255.60 = 8,456.80/x
  3. Step 3: Cross multiply
    28,181.20x = 42,255.60 × 8,456.80
  4. Step 4: Simplify right side
    28,181.20x = 357,347,158.08
  5. Step 5: Solve for x
    x = 357,347,158.08/28,181.20
  6. Step 6: Final answer
    x = 12,680.34

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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.