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Finding the Fourth Proportional to 18,695, 25,799.10 and 10,311.50

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Solution

The fourth proportional to 18,695, 25,799.10 and 10,311.50 is: 14,229.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695 : 25,799.10 = 10,311.50 : x
  2. Step 2: Convert to fraction form
    18,695/25,799.10 = 10,311.50/x
  3. Step 3: Cross multiply
    18,695x = 25,799.10 × 10,311.50
  4. Step 4: Simplify right side
    18,695x = 266,027,419.65
  5. Step 5: Solve for x
    x = 266,027,419.65/18,695
  6. Step 6: Final answer
    x = 14,229.87

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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.