Home / 21,174.19-31,764.30-6,939.62

Finding the Fourth Proportional to 21,174.19, 31,764.30 and 6,939.62

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Solution

The fourth proportional to 21,174.19, 31,764.30 and 6,939.62 is: 10,410.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.19 : 31,764.30 = 6,939.62 : x
  2. Step 2: Convert to fraction form
    21,174.19/31,764.30 = 6,939.62/x
  3. Step 3: Cross multiply
    21,174.19x = 31,764.30 × 6,939.62
  4. Step 4: Simplify right side
    21,174.19x = 220,432,012.74
  5. Step 5: Solve for x
    x = 220,432,012.74/21,174.19
  6. Step 6: Final answer
    x = 10,410.41

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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.