Home / 13,219.72-18,241.92-7,914.42

Finding the Fourth Proportional to 13,219.72, 18,241.92 and 7,914.42

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Solution

The fourth proportional to 13,219.72, 18,241.92 and 7,914.42 is: 10,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.72 : 18,241.92 = 7,914.42 : x
  2. Step 2: Convert to fraction form
    13,219.72/18,241.92 = 7,914.42/x
  3. Step 3: Cross multiply
    13,219.72x = 18,241.92 × 7,914.42
  4. Step 4: Simplify right side
    13,219.72x = 144,374,216.49
  5. Step 5: Solve for x
    x = 144,374,216.49/13,219.72
  6. Step 6: Final answer
    x = 10,921.13

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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.