Home / 22,778.12-31,435.86-13,221.56

Finding the Fourth Proportional to 22,778.12, 31,435.86 and 13,221.56

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Solution

The fourth proportional to 22,778.12, 31,435.86 and 13,221.56 is: 18,246.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,778.12 : 31,435.86 = 13,221.56 : x
  2. Step 2: Convert to fraction form
    22,778.12/31,435.86 = 13,221.56/x
  3. Step 3: Cross multiply
    22,778.12x = 31,435.86 × 13,221.56
  4. Step 4: Simplify right side
    22,778.12x = 415,631,109.14
  5. Step 5: Solve for x
    x = 415,631,109.14/22,778.12
  6. Step 6: Final answer
    x = 18,246.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.