Home / 12,219.77-18,320.68-3,895

Finding the Fourth Proportional to 12,219.77, 18,320.68 and 3,895

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Solution

The fourth proportional to 12,219.77, 18,320.68 and 3,895 is: 5,839.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.77 : 18,320.68 = 3,895 : x
  2. Step 2: Convert to fraction form
    12,219.77/18,320.68 = 3,895/x
  3. Step 3: Cross multiply
    12,219.77x = 18,320.68 × 3,895
  4. Step 4: Simplify right side
    12,219.77x = 71,359,048.60
  5. Step 5: Solve for x
    x = 71,359,048.60/12,219.77
  6. Step 6: Final answer
    x = 5,839.64

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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.