Home / 12,119.10-18,182.70-4,221.60

Finding the Fourth Proportional to 12,119.10, 18,182.70 and 4,221.60

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Solution

The fourth proportional to 12,119.10, 18,182.70 and 4,221.60 is: 6,333.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.10 : 18,182.70 = 4,221.60 : x
  2. Step 2: Convert to fraction form
    12,119.10/18,182.70 = 4,221.60/x
  3. Step 3: Cross multiply
    12,119.10x = 18,182.70 × 4,221.60
  4. Step 4: Simplify right side
    12,119.10x = 76,760,086.32
  5. Step 5: Solve for x
    x = 76,760,086.32/12,119.10
  6. Step 6: Final answer
    x = 6,333.81

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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.