Home / 12,103.20-18,138.60-8,636.40

Finding the Fourth Proportional to 12,103.20, 18,138.60 and 8,636.40

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Solution

The fourth proportional to 12,103.20, 18,138.60 and 8,636.40 is: 12,943.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.20 : 18,138.60 = 8,636.40 : x
  2. Step 2: Convert to fraction form
    12,103.20/18,138.60 = 8,636.40/x
  3. Step 3: Cross multiply
    12,103.20x = 18,138.60 × 8,636.40
  4. Step 4: Simplify right side
    12,103.20x = 156,652,205.04
  5. Step 5: Solve for x
    x = 156,652,205.04/12,103.20
  6. Step 6: Final answer
    x = 12,943.04

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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.