Home / 20,958.72-31,418.40-7,098.24

Finding the Fourth Proportional to 20,958.72, 31,418.40 and 7,098.24

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Solution

The fourth proportional to 20,958.72, 31,418.40 and 7,098.24 is: 10,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.72 : 31,418.40 = 7,098.24 : x
  2. Step 2: Convert to fraction form
    20,958.72/31,418.40 = 7,098.24/x
  3. Step 3: Cross multiply
    20,958.72x = 31,418.40 × 7,098.24
  4. Step 4: Simplify right side
    20,958.72x = 223,015,343.62
  5. Step 5: Solve for x
    x = 223,015,343.62/20,958.72
  6. Step 6: Final answer
    x = 10,640.69

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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.