Home / 20,847.82-31,251.32-13,328.32

Finding the Fourth Proportional to 20,847.82, 31,251.32 and 13,328.32

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Solution

The fourth proportional to 20,847.82, 31,251.32 and 13,328.32 is: 19,979.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.82 : 31,251.32 = 13,328.32 : x
  2. Step 2: Convert to fraction form
    20,847.82/31,251.32 = 13,328.32/x
  3. Step 3: Cross multiply
    20,847.82x = 31,251.32 × 13,328.32
  4. Step 4: Simplify right side
    20,847.82x = 416,527,593.38
  5. Step 5: Solve for x
    x = 416,527,593.38/20,847.82
  6. Step 6: Final answer
    x = 19,979.43

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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.