Home / 12,939.24-19,409.58-3,705

Finding the Fourth Proportional to 12,939.24, 19,409.58 and 3,705

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Solution

The fourth proportional to 12,939.24, 19,409.58 and 3,705 is: 5,557.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.24 : 19,409.58 = 3,705 : x
  2. Step 2: Convert to fraction form
    12,939.24/19,409.58 = 3,705/x
  3. Step 3: Cross multiply
    12,939.24x = 19,409.58 × 3,705
  4. Step 4: Simplify right side
    12,939.24x = 71,912,493.90
  5. Step 5: Solve for x
    x = 71,912,493.90/12,939.24
  6. Step 6: Final answer
    x = 5,557.71

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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.