Home / 12,186.28-18,270.16-3,861.51

Finding the Fourth Proportional to 12,186.28, 18,270.16 and 3,861.51

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Solution

The fourth proportional to 12,186.28, 18,270.16 and 3,861.51 is: 5,789.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.28 : 18,270.16 = 3,861.51 : x
  2. Step 2: Convert to fraction form
    12,186.28/18,270.16 = 3,861.51/x
  3. Step 3: Cross multiply
    12,186.28x = 18,270.16 × 3,861.51
  4. Step 4: Simplify right side
    12,186.28x = 70,550,327.37
  5. Step 5: Solve for x
    x = 70,550,327.37/12,186.28
  6. Step 6: Final answer
    x = 5,789.32

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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.