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Finding the Fourth Proportional to 21,303.76, 29,398.60 and 11,872.08

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Solution

The fourth proportional to 21,303.76, 29,398.60 and 11,872.08 is: 16,383.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.76 : 29,398.60 = 11,872.08 : x
  2. Step 2: Convert to fraction form
    21,303.76/29,398.60 = 11,872.08/x
  3. Step 3: Cross multiply
    21,303.76x = 29,398.60 × 11,872.08
  4. Step 4: Simplify right side
    21,303.76x = 349,022,531.09
  5. Step 5: Solve for x
    x = 349,022,531.09/21,303.76
  6. Step 6: Final answer
    x = 16,383.14

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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.