Home / 21,318.40-31,974.72-5,736.96

Finding the Fourth Proportional to 21,318.40, 31,974.72 and 5,736.96

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Solution

The fourth proportional to 21,318.40, 31,974.72 and 5,736.96 is: 8,604.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.40 : 31,974.72 = 5,736.96 : x
  2. Step 2: Convert to fraction form
    21,318.40/31,974.72 = 5,736.96/x
  3. Step 3: Cross multiply
    21,318.40x = 31,974.72 × 5,736.96
  4. Step 4: Simplify right side
    21,318.40x = 183,437,689.65
  5. Step 5: Solve for x
    x = 183,437,689.65/21,318.40
  6. Step 6: Final answer
    x = 8,604.66

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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.