Home / 13,728.52-18,931.21-11,745.64

Finding the Fourth Proportional to 13,728.52, 18,931.21 and 11,745.64

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Solution

The fourth proportional to 13,728.52, 18,931.21 and 11,745.64 is: 16,196.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.52 : 18,931.21 = 11,745.64 : x
  2. Step 2: Convert to fraction form
    13,728.52/18,931.21 = 11,745.64/x
  3. Step 3: Cross multiply
    13,728.52x = 18,931.21 × 11,745.64
  4. Step 4: Simplify right side
    13,728.52x = 222,359,177.42
  5. Step 5: Solve for x
    x = 222,359,177.42/13,728.52
  6. Step 6: Final answer
    x = 16,196.88

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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.