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Finding the Fourth Proportional to 16,863.41, 25,275.41 and 12,690

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Solution

The fourth proportional to 16,863.41, 25,275.41 and 12,690 is: 19,020.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,863.41 : 25,275.41 = 12,690 : x
  2. Step 2: Convert to fraction form
    16,863.41/25,275.41 = 12,690/x
  3. Step 3: Cross multiply
    16,863.41x = 25,275.41 × 12,690
  4. Step 4: Simplify right side
    16,863.41x = 320,744,952.90
  5. Step 5: Solve for x
    x = 320,744,952.90/16,863.41
  6. Step 6: Final answer
    x = 19,020.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.