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Finding the Fourth Proportional to 21,277.56, 31,930.92 and 7,426.56

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Solution

The fourth proportional to 21,277.56, 31,930.92 and 7,426.56 is: 11,144.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.56 : 31,930.92 = 7,426.56 : x
  2. Step 2: Convert to fraction form
    21,277.56/31,930.92 = 7,426.56/x
  3. Step 3: Cross multiply
    21,277.56x = 31,930.92 × 7,426.56
  4. Step 4: Simplify right side
    21,277.56x = 237,136,893.24
  5. Step 5: Solve for x
    x = 237,136,893.24/21,277.56
  6. Step 6: Final answer
    x = 11,144.93

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.