Home / 12,138.97-18,203.83-4,742.46

Finding the Fourth Proportional to 12,138.97, 18,203.83 and 4,742.46

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Solution

The fourth proportional to 12,138.97, 18,203.83 and 4,742.46 is: 7,111.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.97 : 18,203.83 = 4,742.46 : x
  2. Step 2: Convert to fraction form
    12,138.97/18,203.83 = 4,742.46/x
  3. Step 3: Cross multiply
    12,138.97x = 18,203.83 × 4,742.46
  4. Step 4: Simplify right side
    12,138.97x = 86,330,935.62
  5. Step 5: Solve for x
    x = 86,330,935.62/12,138.97
  6. Step 6: Final answer
    x = 7,111.89

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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.