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Finding the Fourth Proportional to 30,443.99, 42,014.31 and 18,505.40

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Solution

The fourth proportional to 30,443.99, 42,014.31 and 18,505.40 is: 25,538.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,443.99 : 42,014.31 = 18,505.40 : x
  2. Step 2: Convert to fraction form
    30,443.99/42,014.31 = 18,505.40/x
  3. Step 3: Cross multiply
    30,443.99x = 42,014.31 × 18,505.40
  4. Step 4: Simplify right side
    30,443.99x = 777,491,612.27
  5. Step 5: Solve for x
    x = 777,491,612.27/30,443.99
  6. Step 6: Final answer
    x = 25,538.43

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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.