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Finding the Fourth Proportional to 20,861.52, 31,292.52 and 7,010.52

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Solution

The fourth proportional to 20,861.52, 31,292.52 and 7,010.52 is: 10,515.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.52 : 31,292.52 = 7,010.52 : x
  2. Step 2: Convert to fraction form
    20,861.52/31,292.52 = 7,010.52/x
  3. Step 3: Cross multiply
    20,861.52x = 31,292.52 × 7,010.52
  4. Step 4: Simplify right side
    20,861.52x = 219,376,837.31
  5. Step 5: Solve for x
    x = 219,376,837.31/20,861.52
  6. Step 6: Final answer
    x = 10,515.86

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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.