Home / 13,850.10-20,781.21-7,274.79

Finding the Fourth Proportional to 13,850.10, 20,781.21 and 7,274.79

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Solution

The fourth proportional to 13,850.10, 20,781.21 and 7,274.79 is: 10,915.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,850.10 : 20,781.21 = 7,274.79 : x
  2. Step 2: Convert to fraction form
    13,850.10/20,781.21 = 7,274.79/x
  3. Step 3: Cross multiply
    13,850.10x = 20,781.21 × 7,274.79
  4. Step 4: Simplify right side
    13,850.10x = 151,178,938.70
  5. Step 5: Solve for x
    x = 151,178,938.70/13,850.10
  6. Step 6: Final answer
    x = 10,915.37

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1.5x scale

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.