Home / 20,913.26-31,376.03-8,426.87

Finding the Fourth Proportional to 20,913.26, 31,376.03 and 8,426.87

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Solution

The fourth proportional to 20,913.26, 31,376.03 and 8,426.87 is: 12,642.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.26 : 31,376.03 = 8,426.87 : x
  2. Step 2: Convert to fraction form
    20,913.26/31,376.03 = 8,426.87/x
  3. Step 3: Cross multiply
    20,913.26x = 31,376.03 × 8,426.87
  4. Step 4: Simplify right side
    20,913.26x = 264,401,644.57
  5. Step 5: Solve for x
    x = 264,401,644.57/20,913.26
  6. Step 6: Final answer
    x = 12,642.78

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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.