Home / 20,916.82-31,379.28-9,230.14

Finding the Fourth Proportional to 20,916.82, 31,379.28 and 9,230.14

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Solution

The fourth proportional to 20,916.82, 31,379.28 and 9,230.14 is: 13,847.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.82 : 31,379.28 = 9,230.14 : x
  2. Step 2: Convert to fraction form
    20,916.82/31,379.28 = 9,230.14/x
  3. Step 3: Cross multiply
    20,916.82x = 31,379.28 × 9,230.14
  4. Step 4: Simplify right side
    20,916.82x = 289,635,147.50
  5. Step 5: Solve for x
    x = 289,635,147.50/20,916.82
  6. Step 6: Final answer
    x = 13,847.00

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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.