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Finding the Fourth Proportional to 18,685.97, 25,786.46 and 10,302.47

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Solution

The fourth proportional to 18,685.97, 25,786.46 and 10,302.47 is: 14,217.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.97 : 25,786.46 = 10,302.47 : x
  2. Step 2: Convert to fraction form
    18,685.97/25,786.46 = 10,302.47/x
  3. Step 3: Cross multiply
    18,685.97x = 25,786.46 × 10,302.47
  4. Step 4: Simplify right side
    18,685.97x = 265,664,127.38
  5. Step 5: Solve for x
    x = 265,664,127.38/18,685.97
  6. Step 6: Final answer
    x = 14,217.31

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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.