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Finding the Fourth Proportional to 21,701.84, 29,954.84 and 12,629.32

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Solution

The fourth proportional to 21,701.84, 29,954.84 and 12,629.32 is: 17,432.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,701.84 : 29,954.84 = 12,629.32 : x
  2. Step 2: Convert to fraction form
    21,701.84/29,954.84 = 12,629.32/x
  3. Step 3: Cross multiply
    21,701.84x = 29,954.84 × 12,629.32
  4. Step 4: Simplify right side
    21,701.84x = 378,309,157.40
  5. Step 5: Solve for x
    x = 378,309,157.40/21,701.84
  6. Step 6: Final answer
    x = 17,432.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.