Home / 20,791.08-31,172.37-7,463.78

Finding the Fourth Proportional to 20,791.08, 31,172.37 and 7,463.78

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Solution

The fourth proportional to 20,791.08, 31,172.37 and 7,463.78 is: 11,190.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.08 : 31,172.37 = 7,463.78 : x
  2. Step 2: Convert to fraction form
    20,791.08/31,172.37 = 7,463.78/x
  3. Step 3: Cross multiply
    20,791.08x = 31,172.37 × 7,463.78
  4. Step 4: Simplify right side
    20,791.08x = 232,663,711.76
  5. Step 5: Solve for x
    x = 232,663,711.76/20,791.08
  6. Step 6: Final answer
    x = 11,190.55

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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.