Home / 20,857.14-31,283.16-8,376.66

Finding the Fourth Proportional to 20,857.14, 31,283.16 and 8,376.66

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Solution

The fourth proportional to 20,857.14, 31,283.16 and 8,376.66 is: 12,563.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.14 : 31,283.16 = 8,376.66 : x
  2. Step 2: Convert to fraction form
    20,857.14/31,283.16 = 8,376.66/x
  3. Step 3: Cross multiply
    20,857.14x = 31,283.16 × 8,376.66
  4. Step 4: Simplify right side
    20,857.14x = 262,048,395.05
  5. Step 5: Solve for x
    x = 262,048,395.05/20,857.14
  6. Step 6: Final answer
    x = 12,563.97

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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.