Home / 21,163.63-31,744.46-8,680.57

Finding the Fourth Proportional to 21,163.63, 31,744.46 and 8,680.57

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Solution

The fourth proportional to 21,163.63, 31,744.46 and 8,680.57 is: 13,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.63 : 31,744.46 = 8,680.57 : x
  2. Step 2: Convert to fraction form
    21,163.63/31,744.46 = 8,680.57/x
  3. Step 3: Cross multiply
    21,163.63x = 31,744.46 × 8,680.57
  4. Step 4: Simplify right side
    21,163.63x = 275,559,900.65
  5. Step 5: Solve for x
    x = 275,559,900.65/21,163.63
  6. Step 6: Final answer
    x = 13,020.45

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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.