Home / 12,761.82-19,133.28-3,991.68

Finding the Fourth Proportional to 12,761.82, 19,133.28 and 3,991.68

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Solution

The fourth proportional to 12,761.82, 19,133.28 and 3,991.68 is: 5,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,761.82 : 19,133.28 = 3,991.68 : x
  2. Step 2: Convert to fraction form
    12,761.82/19,133.28 = 3,991.68/x
  3. Step 3: Cross multiply
    12,761.82x = 19,133.28 × 3,991.68
  4. Step 4: Simplify right side
    12,761.82x = 76,373,931.11
  5. Step 5: Solve for x
    x = 76,373,931.11/12,761.82
  6. Step 6: Final answer
    x = 5,984.56

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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.