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Finding the Fourth Proportional to 12,755.84, 19,133.76 and 3,991.56

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Solution

The fourth proportional to 12,755.84, 19,133.76 and 3,991.56 is: 5,987.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.84 : 19,133.76 = 3,991.56 : x
  2. Step 2: Convert to fraction form
    12,755.84/19,133.76 = 3,991.56/x
  3. Step 3: Cross multiply
    12,755.84x = 19,133.76 × 3,991.56
  4. Step 4: Simplify right side
    12,755.84x = 76,373,551.07
  5. Step 5: Solve for x
    x = 76,373,551.07/12,755.84
  6. Step 6: Final answer
    x = 5,987.34

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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.