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Finding the Fourth Proportional to 28,832.56, 39,729.89 and 21,266.90

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Solution

The fourth proportional to 28,832.56, 39,729.89 and 21,266.90 is: 29,304.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,832.56 : 39,729.89 = 21,266.90 : x
  2. Step 2: Convert to fraction form
    28,832.56/39,729.89 = 21,266.90/x
  3. Step 3: Cross multiply
    28,832.56x = 39,729.89 × 21,266.90
  4. Step 4: Simplify right side
    28,832.56x = 844,931,491.31
  5. Step 5: Solve for x
    x = 844,931,491.31/28,832.56
  6. Step 6: Final answer
    x = 29,304.77

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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.