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Finding the Fourth Proportional to 27,671.87, 38,187 and 15,735.21

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Solution

The fourth proportional to 27,671.87, 38,187 and 15,735.21 is: 21,714.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,671.87 : 38,187 = 15,735.21 : x
  2. Step 2: Convert to fraction form
    27,671.87/38,187 = 15,735.21/x
  3. Step 3: Cross multiply
    27,671.87x = 38,187 × 15,735.21
  4. Step 4: Simplify right side
    27,671.87x = 600,880,464.27
  5. Step 5: Solve for x
    x = 600,880,464.27/27,671.87
  6. Step 6: Final answer
    x = 21,714.49

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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.