Home / 12,120.30-18,156.15-8,183.70

Finding the Fourth Proportional to 12,120.30, 18,156.15 and 8,183.70

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Solution

The fourth proportional to 12,120.30, 18,156.15 and 8,183.70 is: 12,259.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.30 : 18,156.15 = 8,183.70 : x
  2. Step 2: Convert to fraction form
    12,120.30/18,156.15 = 8,183.70/x
  3. Step 3: Cross multiply
    12,120.30x = 18,156.15 × 8,183.70
  4. Step 4: Simplify right side
    12,120.30x = 148,584,484.76
  5. Step 5: Solve for x
    x = 148,584,484.76/12,120.30
  6. Step 6: Final answer
    x = 12,259.14

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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.