Home / 12,220.36-18,320.82-5,290

Finding the Fourth Proportional to 12,220.36, 18,320.82 and 5,290

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Solution

The fourth proportional to 12,220.36, 18,320.82 and 5,290 is: 7,930.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.36 : 18,320.82 = 5,290 : x
  2. Step 2: Convert to fraction form
    12,220.36/18,320.82 = 5,290/x
  3. Step 3: Cross multiply
    12,220.36x = 18,320.82 × 5,290
  4. Step 4: Simplify right side
    12,220.36x = 96,917,137.80
  5. Step 5: Solve for x
    x = 96,917,137.80/12,220.36
  6. Step 6: Final answer
    x = 7,930.79

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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.