Home / 12,106.30-18,135.15-8,169.70

Finding the Fourth Proportional to 12,106.30, 18,135.15 and 8,169.70

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Solution

The fourth proportional to 12,106.30, 18,135.15 and 8,169.70 is: 12,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,106.30 : 18,135.15 = 8,169.70 : x
  2. Step 2: Convert to fraction form
    12,106.30/18,135.15 = 8,169.70/x
  3. Step 3: Cross multiply
    12,106.30x = 18,135.15 × 8,169.70
  4. Step 4: Simplify right side
    12,106.30x = 148,158,734.96
  5. Step 5: Solve for x
    x = 148,158,734.96/12,106.30
  6. Step 6: Final answer
    x = 12,238.15

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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.