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Finding the Fourth Proportional to 19,671.72, 27,147.87 and 11,605.68

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Solution

The fourth proportional to 19,671.72, 27,147.87 and 11,605.68 is: 16,016.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.72 : 27,147.87 = 11,605.68 : x
  2. Step 2: Convert to fraction form
    19,671.72/27,147.87 = 11,605.68/x
  3. Step 3: Cross multiply
    19,671.72x = 27,147.87 × 11,605.68
  4. Step 4: Simplify right side
    19,671.72x = 315,069,491.90
  5. Step 5: Solve for x
    x = 315,069,491.90/19,671.72
  6. Step 6: Final answer
    x = 16,016.37

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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.