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Finding the Fourth Proportional to 18,754.75, 25,854.84 and 12,778.75

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Solution

The fourth proportional to 18,754.75, 25,854.84 and 12,778.75 is: 17,616.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.75 : 25,854.84 = 12,778.75 : x
  2. Step 2: Convert to fraction form
    18,754.75/25,854.84 = 12,778.75/x
  3. Step 3: Cross multiply
    18,754.75x = 25,854.84 × 12,778.75
  4. Step 4: Simplify right side
    18,754.75x = 330,392,536.65
  5. Step 5: Solve for x
    x = 330,392,536.65/18,754.75
  6. Step 6: Final answer
    x = 17,616.47

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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.