Home / 13,721.54-18,944.55-11,209.73

Finding the Fourth Proportional to 13,721.54, 18,944.55 and 11,209.73

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Solution

The fourth proportional to 13,721.54, 18,944.55 and 11,209.73 is: 15,476.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.54 : 18,944.55 = 11,209.73 : x
  2. Step 2: Convert to fraction form
    13,721.54/18,944.55 = 11,209.73/x
  3. Step 3: Cross multiply
    13,721.54x = 18,944.55 × 11,209.73
  4. Step 4: Simplify right side
    13,721.54x = 212,363,195.75
  5. Step 5: Solve for x
    x = 212,363,195.75/13,721.54
  6. Step 6: Final answer
    x = 15,476.64

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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.