Home / 12,221.54-18,332.15-2,987.62

Finding the Fourth Proportional to 12,221.54, 18,332.15 and 2,987.62

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Solution

The fourth proportional to 12,221.54, 18,332.15 and 2,987.62 is: 4,481.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.54 : 18,332.15 = 2,987.62 : x
  2. Step 2: Convert to fraction form
    12,221.54/18,332.15 = 2,987.62/x
  3. Step 3: Cross multiply
    12,221.54x = 18,332.15 × 2,987.62
  4. Step 4: Simplify right side
    12,221.54x = 54,769,497.98
  5. Step 5: Solve for x
    x = 54,769,497.98/12,221.54
  6. Step 6: Final answer
    x = 4,481.39

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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.