Home / 12,138.20-18,212.88-5,566.40

Finding the Fourth Proportional to 12,138.20, 18,212.88 and 5,566.40

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Solution

The fourth proportional to 12,138.20, 18,212.88 and 5,566.40 is: 8,352.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.20 : 18,212.88 = 5,566.40 : x
  2. Step 2: Convert to fraction form
    12,138.20/18,212.88 = 5,566.40/x
  3. Step 3: Cross multiply
    12,138.20x = 18,212.88 × 5,566.40
  4. Step 4: Simplify right side
    12,138.20x = 101,380,175.23
  5. Step 5: Solve for x
    x = 101,380,175.23/12,138.20
  6. Step 6: Final answer
    x = 8,352.16

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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.