Home / 12,170.20-18,254.34-3,405.40

Finding the Fourth Proportional to 12,170.20, 18,254.34 and 3,405.40

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Solution

The fourth proportional to 12,170.20, 18,254.34 and 3,405.40 is: 5,107.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,170.20 : 18,254.34 = 3,405.40 : x
  2. Step 2: Convert to fraction form
    12,170.20/18,254.34 = 3,405.40/x
  3. Step 3: Cross multiply
    12,170.20x = 18,254.34 × 3,405.40
  4. Step 4: Simplify right side
    12,170.20x = 62,163,329.44
  5. Step 5: Solve for x
    x = 62,163,329.44/12,170.20
  6. Step 6: Final answer
    x = 5,107.83

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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.