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Finding the Fourth Proportional to 19,671.35, 27,147.35 and 11,605.31

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Solution

The fourth proportional to 19,671.35, 27,147.35 and 11,605.31 is: 16,015.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.35 : 27,147.35 = 11,605.31 : x
  2. Step 2: Convert to fraction form
    19,671.35/27,147.35 = 11,605.31/x
  3. Step 3: Cross multiply
    19,671.35x = 27,147.35 × 11,605.31
  4. Step 4: Simplify right side
    19,671.35x = 315,053,305.71
  5. Step 5: Solve for x
    x = 315,053,305.71/19,671.35
  6. Step 6: Final answer
    x = 16,015.85

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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.