Home / 13,760.55-20,638.89-5,438.43

Finding the Fourth Proportional to 13,760.55, 20,638.89 and 5,438.43

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Solution

The fourth proportional to 13,760.55, 20,638.89 and 5,438.43 is: 8,156.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,760.55 : 20,638.89 = 5,438.43 : x
  2. Step 2: Convert to fraction form
    13,760.55/20,638.89 = 5,438.43/x
  3. Step 3: Cross multiply
    13,760.55x = 20,638.89 × 5,438.43
  4. Step 4: Simplify right side
    13,760.55x = 112,243,158.54
  5. Step 5: Solve for x
    x = 112,243,158.54/13,760.55
  6. Step 6: Final answer
    x = 8,156.88

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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.