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Finding the Fourth Proportional to 19,691.84, 27,183.84 and 12,139.52

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Solution

The fourth proportional to 19,691.84, 27,183.84 and 12,139.52 is: 16,758.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.84 : 27,183.84 = 12,139.52 : x
  2. Step 2: Convert to fraction form
    19,691.84/27,183.84 = 12,139.52/x
  3. Step 3: Cross multiply
    19,691.84x = 27,183.84 × 12,139.52
  4. Step 4: Simplify right side
    19,691.84x = 329,998,769.36
  5. Step 5: Solve for x
    x = 329,998,769.36/19,691.84
  6. Step 6: Final answer
    x = 16,758.15

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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.