Home / 8,138.40-12,199.20-4,432.80

Finding the Fourth Proportional to 8,138.40, 12,199.20 and 4,432.80

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Solution

The fourth proportional to 8,138.40, 12,199.20 and 4,432.80 is: 6,644.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.40 : 12,199.20 = 4,432.80 : x
  2. Step 2: Convert to fraction form
    8,138.40/12,199.20 = 4,432.80/x
  3. Step 3: Cross multiply
    8,138.40x = 12,199.20 × 4,432.80
  4. Step 4: Simplify right side
    8,138.40x = 54,076,613.76
  5. Step 5: Solve for x
    x = 54,076,613.76/8,138.40
  6. Step 6: Final answer
    x = 6,644.62

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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.