Home / 13,911.72-20,867.40-3,381.84

Finding the Fourth Proportional to 13,911.72, 20,867.40 and 3,381.84

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Solution

The fourth proportional to 13,911.72, 20,867.40 and 3,381.84 is: 5,072.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.72 : 20,867.40 = 3,381.84 : x
  2. Step 2: Convert to fraction form
    13,911.72/20,867.40 = 3,381.84/x
  3. Step 3: Cross multiply
    13,911.72x = 20,867.40 × 3,381.84
  4. Step 4: Simplify right side
    13,911.72x = 70,570,208.02
  5. Step 5: Solve for x
    x = 70,570,208.02/13,911.72
  6. Step 6: Final answer
    x = 5,072.72

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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.