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Finding the Fourth Proportional to 18,379.40, 25,362.84 and 9,995.90

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Solution

The fourth proportional to 18,379.40, 25,362.84 and 9,995.90 is: 13,793.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.40 : 25,362.84 = 9,995.90 : x
  2. Step 2: Convert to fraction form
    18,379.40/25,362.84 = 9,995.90/x
  3. Step 3: Cross multiply
    18,379.40x = 25,362.84 × 9,995.90
  4. Step 4: Simplify right side
    18,379.40x = 253,524,412.36
  5. Step 5: Solve for x
    x = 253,524,412.36/18,379.40
  6. Step 6: Final answer
    x = 13,793.94

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Similar ratio
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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.