Home / 20,942.93-31,384.58-10,402.62

Finding the Fourth Proportional to 20,942.93, 31,384.58 and 10,402.62

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Solution

The fourth proportional to 20,942.93, 31,384.58 and 10,402.62 is: 15,589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.93 : 31,384.58 = 10,402.62 : x
  2. Step 2: Convert to fraction form
    20,942.93/31,384.58 = 10,402.62/x
  3. Step 3: Cross multiply
    20,942.93x = 31,384.58 × 10,402.62
  4. Step 4: Simplify right side
    20,942.93x = 326,481,859.60
  5. Step 5: Solve for x
    x = 326,481,859.60/20,942.93
  6. Step 6: Final answer
    x = 15,589.12

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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.