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Finding the Fourth Proportional to 13,775.52, 20,660.16 and 3,914.56

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Solution

The fourth proportional to 13,775.52, 20,660.16 and 3,914.56 is: 5,870.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.52 : 20,660.16 = 3,914.56 : x
  2. Step 2: Convert to fraction form
    13,775.52/20,660.16 = 3,914.56/x
  3. Step 3: Cross multiply
    13,775.52x = 20,660.16 × 3,914.56
  4. Step 4: Simplify right side
    13,775.52x = 80,875,435.93
  5. Step 5: Solve for x
    x = 80,875,435.93/13,775.52
  6. Step 6: Final answer
    x = 5,870.95

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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.