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Finding the Fourth Proportional to 30,665.66, 42,319.82 and 17,236.88

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Solution

The fourth proportional to 30,665.66, 42,319.82 and 17,236.88 is: 23,787.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,665.66 : 42,319.82 = 17,236.88 : x
  2. Step 2: Convert to fraction form
    30,665.66/42,319.82 = 17,236.88/x
  3. Step 3: Cross multiply
    30,665.66x = 42,319.82 × 17,236.88
  4. Step 4: Simplify right side
    30,665.66x = 729,461,361.18
  5. Step 5: Solve for x
    x = 729,461,361.18/30,665.66
  6. Step 6: Final answer
    x = 23,787.56

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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.