Home / 13,781.55-20,672.29-3,786.31

Finding the Fourth Proportional to 13,781.55, 20,672.29 and 3,786.31

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Solution

The fourth proportional to 13,781.55, 20,672.29 and 3,786.31 is: 5,679.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.55 : 20,672.29 = 3,786.31 : x
  2. Step 2: Convert to fraction form
    13,781.55/20,672.29 = 3,786.31/x
  3. Step 3: Cross multiply
    13,781.55x = 20,672.29 × 3,786.31
  4. Step 4: Simplify right side
    13,781.55x = 78,271,576.06
  5. Step 5: Solve for x
    x = 78,271,576.06/13,781.55
  6. Step 6: Final answer
    x = 5,679.45

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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.