Home / 8,237.20-12,339.60-5,612.80

Finding the Fourth Proportional to 8,237.20, 12,339.60 and 5,612.80

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Solution

The fourth proportional to 8,237.20, 12,339.60 and 5,612.80 is: 8,408.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,237.20 : 12,339.60 = 5,612.80 : x
  2. Step 2: Convert to fraction form
    8,237.20/12,339.60 = 5,612.80/x
  3. Step 3: Cross multiply
    8,237.20x = 12,339.60 × 5,612.80
  4. Step 4: Simplify right side
    8,237.20x = 69,259,706.88
  5. Step 5: Solve for x
    x = 69,259,706.88/8,237.20
  6. Step 6: Final answer
    x = 8,408.16

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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.