Home / 13,538.28-18,691.63-12,119.55

Finding the Fourth Proportional to 13,538.28, 18,691.63 and 12,119.55

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Solution

The fourth proportional to 13,538.28, 18,691.63 and 12,119.55 is: 16,732.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,538.28 : 18,691.63 = 12,119.55 : x
  2. Step 2: Convert to fraction form
    13,538.28/18,691.63 = 12,119.55/x
  3. Step 3: Cross multiply
    13,538.28x = 18,691.63 × 12,119.55
  4. Step 4: Simplify right side
    13,538.28x = 226,534,144.37
  5. Step 5: Solve for x
    x = 226,534,144.37/13,538.28
  6. Step 6: Final answer
    x = 16,732.86

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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.