Home / 13,591.78-18,753.66-13,143.79

Finding the Fourth Proportional to 13,591.78, 18,753.66 and 13,143.79

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Solution

The fourth proportional to 13,591.78, 18,753.66 and 13,143.79 is: 18,135.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.78 : 18,753.66 = 13,143.79 : x
  2. Step 2: Convert to fraction form
    13,591.78/18,753.66 = 13,143.79/x
  3. Step 3: Cross multiply
    13,591.78x = 18,753.66 × 13,143.79
  4. Step 4: Simplify right side
    13,591.78x = 246,494,168.77
  5. Step 5: Solve for x
    x = 246,494,168.77/13,591.78
  6. Step 6: Final answer
    x = 18,135.53

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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.