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Finding the Fourth Proportional to 18,686, 25,786.68 and 10,302.68

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Solution

The fourth proportional to 18,686, 25,786.68 and 10,302.68 is: 14,217.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686 : 25,786.68 = 10,302.68 : x
  2. Step 2: Convert to fraction form
    18,686/25,786.68 = 10,302.68/x
  3. Step 3: Cross multiply
    18,686x = 25,786.68 × 10,302.68
  4. Step 4: Simplify right side
    18,686x = 265,671,912.30
  5. Step 5: Solve for x
    x = 265,671,912.30/18,686
  6. Step 6: Final answer
    x = 14,217.70

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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.