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Finding the Fourth Proportional to 21,083.20, 29,094.40 and 11,652.16

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Solution

The fourth proportional to 21,083.20, 29,094.40 and 11,652.16 is: 16,079.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.20 : 29,094.40 = 11,652.16 : x
  2. Step 2: Convert to fraction form
    21,083.20/29,094.40 = 11,652.16/x
  3. Step 3: Cross multiply
    21,083.20x = 29,094.40 × 11,652.16
  4. Step 4: Simplify right side
    21,083.20x = 339,012,603.90
  5. Step 5: Solve for x
    x = 339,012,603.90/21,083.20
  6. Step 6: Final answer
    x = 16,079.75

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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.