Home / 20,288.91-30,433.37-9,891.75

Finding the Fourth Proportional to 20,288.91, 30,433.37 and 9,891.75

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Solution

The fourth proportional to 20,288.91, 30,433.37 and 9,891.75 is: 14,837.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.91 : 30,433.37 = 9,891.75 : x
  2. Step 2: Convert to fraction form
    20,288.91/30,433.37 = 9,891.75/x
  3. Step 3: Cross multiply
    20,288.91x = 30,433.37 × 9,891.75
  4. Step 4: Simplify right side
    20,288.91x = 301,039,287.70
  5. Step 5: Solve for x
    x = 301,039,287.70/20,288.91
  6. Step 6: Final answer
    x = 14,837.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.