Home / 13,220.97-18,241.55-7,912.03

Finding the Fourth Proportional to 13,220.97, 18,241.55 and 7,912.03

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Solution

The fourth proportional to 13,220.97, 18,241.55 and 7,912.03 is: 10,916.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.97 : 18,241.55 = 7,912.03 : x
  2. Step 2: Convert to fraction form
    13,220.97/18,241.55 = 7,912.03/x
  3. Step 3: Cross multiply
    13,220.97x = 18,241.55 × 7,912.03
  4. Step 4: Simplify right side
    13,220.97x = 144,327,690.85
  5. Step 5: Solve for x
    x = 144,327,690.85/13,220.97
  6. Step 6: Final answer
    x = 10,916.57

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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.