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Finding the Fourth Proportional to 18,323.15, 25,285.91 and 9,939.65

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Solution

The fourth proportional to 18,323.15, 25,285.91 and 9,939.65 is: 13,716.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,323.15 : 25,285.91 = 9,939.65 : x
  2. Step 2: Convert to fraction form
    18,323.15/25,285.91 = 9,939.65/x
  3. Step 3: Cross multiply
    18,323.15x = 25,285.91 × 9,939.65
  4. Step 4: Simplify right side
    18,323.15x = 251,332,919.20
  5. Step 5: Solve for x
    x = 251,332,919.20/18,323.15
  6. Step 6: Final answer
    x = 13,716.69

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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.