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Finding the Fourth Proportional to 21,322.64, 29,424.92 and 12,371.69

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Solution

The fourth proportional to 21,322.64, 29,424.92 and 12,371.69 is: 17,072.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.64 : 29,424.92 = 12,371.69 : x
  2. Step 2: Convert to fraction form
    21,322.64/29,424.92 = 12,371.69/x
  3. Step 3: Cross multiply
    21,322.64x = 29,424.92 × 12,371.69
  4. Step 4: Simplify right side
    21,322.64x = 364,035,904.29
  5. Step 5: Solve for x
    x = 364,035,904.29/21,322.64
  6. Step 6: Final answer
    x = 17,072.74

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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.