Home / 13,215.35-19,811.59-12,481.49

Finding the Fourth Proportional to 13,215.35, 19,811.59 and 12,481.49

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Solution

The fourth proportional to 13,215.35, 19,811.59 and 12,481.49 is: 18,711.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.35 : 19,811.59 = 12,481.49 : x
  2. Step 2: Convert to fraction form
    13,215.35/19,811.59 = 12,481.49/x
  3. Step 3: Cross multiply
    13,215.35x = 19,811.59 × 12,481.49
  4. Step 4: Simplify right side
    13,215.35x = 247,278,180.79
  5. Step 5: Solve for x
    x = 247,278,180.79/13,215.35
  6. Step 6: Final answer
    x = 18,711.43

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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.