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Finding the Fourth Proportional to 21,516.56, 29,692.87 and 12,085.13

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Solution

The fourth proportional to 21,516.56, 29,692.87 and 12,085.13 is: 16,677.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.56 : 29,692.87 = 12,085.13 : x
  2. Step 2: Convert to fraction form
    21,516.56/29,692.87 = 12,085.13/x
  3. Step 3: Cross multiply
    21,516.56x = 29,692.87 × 12,085.13
  4. Step 4: Simplify right side
    21,516.56x = 358,842,015.35
  5. Step 5: Solve for x
    x = 358,842,015.35/21,516.56
  6. Step 6: Final answer
    x = 16,677.48

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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.