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Finding the Fourth Proportional to 18,974.88, 26,179.92 and 12,260.64

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Solution

The fourth proportional to 18,974.88, 26,179.92 and 12,260.64 is: 16,916.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.88 : 26,179.92 = 12,260.64 : x
  2. Step 2: Convert to fraction form
    18,974.88/26,179.92 = 12,260.64/x
  3. Step 3: Cross multiply
    18,974.88x = 26,179.92 × 12,260.64
  4. Step 4: Simplify right side
    18,974.88x = 320,982,574.35
  5. Step 5: Solve for x
    x = 320,982,574.35/18,974.88
  6. Step 6: Final answer
    x = 16,916.18

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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.