Home / 20,732.20-31,163.10-20,343.40

Finding the Fourth Proportional to 20,732.20, 31,163.10 and 20,343.40

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Solution

The fourth proportional to 20,732.20, 31,163.10 and 20,343.40 is: 30,578.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.20 : 31,163.10 = 20,343.40 : x
  2. Step 2: Convert to fraction form
    20,732.20/31,163.10 = 20,343.40/x
  3. Step 3: Cross multiply
    20,732.20x = 31,163.10 × 20,343.40
  4. Step 4: Simplify right side
    20,732.20x = 633,963,408.54
  5. Step 5: Solve for x
    x = 633,963,408.54/20,732.20
  6. Step 6: Final answer
    x = 30,578.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.