Home / 20,942.74-31,423.43-10,423.27

Finding the Fourth Proportional to 20,942.74, 31,423.43 and 10,423.27

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Solution

The fourth proportional to 20,942.74, 31,423.43 and 10,423.27 is: 15,639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.74 : 31,423.43 = 10,423.27 : x
  2. Step 2: Convert to fraction form
    20,942.74/31,423.43 = 10,423.27/x
  3. Step 3: Cross multiply
    20,942.74x = 31,423.43 × 10,423.27
  4. Step 4: Simplify right side
    20,942.74x = 327,534,895.22
  5. Step 5: Solve for x
    x = 327,534,895.22/20,942.74
  6. Step 6: Final answer
    x = 15,639.54

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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.