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Finding the Fourth Proportional to 21,101.22, 29,118.74 and 12,149.01

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Solution

The fourth proportional to 21,101.22, 29,118.74 and 12,149.01 is: 16,765.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.22 : 29,118.74 = 12,149.01 : x
  2. Step 2: Convert to fraction form
    21,101.22/29,118.74 = 12,149.01/x
  3. Step 3: Cross multiply
    21,101.22x = 29,118.74 × 12,149.01
  4. Step 4: Simplify right side
    21,101.22x = 353,763,802.70
  5. Step 5: Solve for x
    x = 353,763,802.70/21,101.22
  6. Step 6: Final answer
    x = 16,765.09

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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.