Home / 20,974.99-31,463.57-7,647.68

Finding the Fourth Proportional to 20,974.99, 31,463.57 and 7,647.68

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Solution

The fourth proportional to 20,974.99, 31,463.57 and 7,647.68 is: 11,471.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.99 : 31,463.57 = 7,647.68 : x
  2. Step 2: Convert to fraction form
    20,974.99/31,463.57 = 7,647.68/x
  3. Step 3: Cross multiply
    20,974.99x = 31,463.57 × 7,647.68
  4. Step 4: Simplify right side
    20,974.99x = 240,623,157.70
  5. Step 5: Solve for x
    x = 240,623,157.70/20,974.99
  6. Step 6: Final answer
    x = 11,471.91

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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.