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Finding the Fourth Proportional to 18,694.79, 25,746.32 and 18,286.55

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Solution

The fourth proportional to 18,694.79, 25,746.32 and 18,286.55 is: 25,184.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.79 : 25,746.32 = 18,286.55 : x
  2. Step 2: Convert to fraction form
    18,694.79/25,746.32 = 18,286.55/x
  3. Step 3: Cross multiply
    18,694.79x = 25,746.32 × 18,286.55
  4. Step 4: Simplify right side
    18,694.79x = 470,811,212.20
  5. Step 5: Solve for x
    x = 470,811,212.20/18,694.79
  6. Step 6: Final answer
    x = 25,184.09

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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.