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Finding the Fourth Proportional to 21,865.51, 30,176.04 and 12,306.97

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Solution

The fourth proportional to 21,865.51, 30,176.04 and 12,306.97 is: 16,984.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.51 : 30,176.04 = 12,306.97 : x
  2. Step 2: Convert to fraction form
    21,865.51/30,176.04 = 12,306.97/x
  3. Step 3: Cross multiply
    21,865.51x = 30,176.04 × 12,306.97
  4. Step 4: Simplify right side
    21,865.51x = 371,375,702.87
  5. Step 5: Solve for x
    x = 371,375,702.87/21,865.51
  6. Step 6: Final answer
    x = 16,984.54

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