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Finding the Fourth Proportional to 18,808.40, 25,943.79 and 12,102.74

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Solution

The fourth proportional to 18,808.40, 25,943.79 and 12,102.74 is: 16,694.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.40 : 25,943.79 = 12,102.74 : x
  2. Step 2: Convert to fraction form
    18,808.40/25,943.79 = 12,102.74/x
  3. Step 3: Cross multiply
    18,808.40x = 25,943.79 × 12,102.74
  4. Step 4: Simplify right side
    18,808.40x = 313,990,944.98
  5. Step 5: Solve for x
    x = 313,990,944.98/18,808.40
  6. Step 6: Final answer
    x = 16,694.19

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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.