Home / 12,213.79-18,320.39-3,448.58

Finding the Fourth Proportional to 12,213.79, 18,320.39 and 3,448.58

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Solution

The fourth proportional to 12,213.79, 18,320.39 and 3,448.58 is: 5,172.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.79 : 18,320.39 = 3,448.58 : x
  2. Step 2: Convert to fraction form
    12,213.79/18,320.39 = 3,448.58/x
  3. Step 3: Cross multiply
    12,213.79x = 18,320.39 × 3,448.58
  4. Step 4: Simplify right side
    12,213.79x = 63,179,313.30
  5. Step 5: Solve for x
    x = 63,179,313.30/12,213.79
  6. Step 6: Final answer
    x = 5,172.78

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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.