Home / 21,318.30-31,986.66-11,446.02

Finding the Fourth Proportional to 21,318.30, 31,986.66 and 11,446.02

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Solution

The fourth proportional to 21,318.30, 31,986.66 and 11,446.02 is: 17,173.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.30 : 31,986.66 = 11,446.02 : x
  2. Step 2: Convert to fraction form
    21,318.30/31,986.66 = 11,446.02/x
  3. Step 3: Cross multiply
    21,318.30x = 31,986.66 × 11,446.02
  4. Step 4: Simplify right side
    21,318.30x = 366,119,950.09
  5. Step 5: Solve for x
    x = 366,119,950.09/21,318.30
  6. Step 6: Final answer
    x = 17,173.97

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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.