Home / 30,968.22-42,753.87-20,388.62

Finding the Fourth Proportional to 30,968.22, 42,753.87 and 20,388.62

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Solution

The fourth proportional to 30,968.22, 42,753.87 and 20,388.62 is: 28,147.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.22 : 42,753.87 = 20,388.62 : x
  2. Step 2: Convert to fraction form
    30,968.22/42,753.87 = 20,388.62/x
  3. Step 3: Cross multiply
    30,968.22x = 42,753.87 × 20,388.62
  4. Step 4: Simplify right side
    30,968.22x = 871,692,408.96
  5. Step 5: Solve for x
    x = 871,692,408.96/30,968.22
  6. Step 6: Final answer
    x = 28,147.97

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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.