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Finding the Fourth Proportional to 18,706.60, 25,815.25 and 10,208.79

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Solution

The fourth proportional to 18,706.60, 25,815.25 and 10,208.79 is: 14,088.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.60 : 25,815.25 = 10,208.79 : x
  2. Step 2: Convert to fraction form
    18,706.60/25,815.25 = 10,208.79/x
  3. Step 3: Cross multiply
    18,706.60x = 25,815.25 × 10,208.79
  4. Step 4: Simplify right side
    18,706.60x = 263,542,336.97
  5. Step 5: Solve for x
    x = 263,542,336.97/18,706.60
  6. Step 6: Final answer
    x = 14,088.20

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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.