Home / 13,755.42-18,994.11-8,728.56

Finding the Fourth Proportional to 13,755.42, 18,994.11 and 8,728.56

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Solution

The fourth proportional to 13,755.42, 18,994.11 and 8,728.56 is: 12,052.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.42 : 18,994.11 = 8,728.56 : x
  2. Step 2: Convert to fraction form
    13,755.42/18,994.11 = 8,728.56/x
  3. Step 3: Cross multiply
    13,755.42x = 18,994.11 × 8,728.56
  4. Step 4: Simplify right side
    13,755.42x = 165,791,228.78
  5. Step 5: Solve for x
    x = 165,791,228.78/13,755.42
  6. Step 6: Final answer
    x = 12,052.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.