Home / 13,771.89-18,987.75-11,251.44

Finding the Fourth Proportional to 13,771.89, 18,987.75 and 11,251.44

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Solution

The fourth proportional to 13,771.89, 18,987.75 and 11,251.44 is: 15,512.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,771.89 : 18,987.75 = 11,251.44 : x
  2. Step 2: Convert to fraction form
    13,771.89/18,987.75 = 11,251.44/x
  3. Step 3: Cross multiply
    13,771.89x = 18,987.75 × 11,251.44
  4. Step 4: Simplify right side
    13,771.89x = 213,639,529.86
  5. Step 5: Solve for x
    x = 213,639,529.86/13,771.89
  6. Step 6: Final answer
    x = 15,512.72

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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.