Home / 21,489.24-29,654.67-11,928.57

Finding the Fourth Proportional to 21,489.24, 29,654.67 and 11,928.57

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Solution

The fourth proportional to 21,489.24, 29,654.67 and 11,928.57 is: 16,461.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.24 : 29,654.67 = 11,928.57 : x
  2. Step 2: Convert to fraction form
    21,489.24/29,654.67 = 11,928.57/x
  3. Step 3: Cross multiply
    21,489.24x = 29,654.67 × 11,928.57
  4. Step 4: Simplify right side
    21,489.24x = 353,737,806.92
  5. Step 5: Solve for x
    x = 353,737,806.92/21,489.24
  6. Step 6: Final answer
    x = 16,461.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.