Home / 30,936.11-42,665.48-20,851.30

Finding the Fourth Proportional to 30,936.11, 42,665.48 and 20,851.30

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Solution

The fourth proportional to 30,936.11, 42,665.48 and 20,851.30 is: 28,757.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.11 : 42,665.48 = 20,851.30 : x
  2. Step 2: Convert to fraction form
    30,936.11/42,665.48 = 20,851.30/x
  3. Step 3: Cross multiply
    30,936.11x = 42,665.48 × 20,851.30
  4. Step 4: Simplify right side
    30,936.11x = 889,630,723.12
  5. Step 5: Solve for x
    x = 889,630,723.12/30,936.11
  6. Step 6: Final answer
    x = 28,757.03

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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.