Home / 20,911.14-31,374.87-9,216.12

Finding the Fourth Proportional to 20,911.14, 31,374.87 and 9,216.12

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Solution

The fourth proportional to 20,911.14, 31,374.87 and 9,216.12 is: 13,827.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.14 : 31,374.87 = 9,216.12 : x
  2. Step 2: Convert to fraction form
    20,911.14/31,374.87 = 9,216.12/x
  3. Step 3: Cross multiply
    20,911.14x = 31,374.87 × 9,216.12
  4. Step 4: Simplify right side
    20,911.14x = 289,154,566.90
  5. Step 5: Solve for x
    x = 289,154,566.90/20,911.14
  6. Step 6: Final answer
    x = 13,827.78

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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.