Home / 7,420.38-11,131.79-3,523.47

Finding the Fourth Proportional to 7,420.38, 11,131.79 and 3,523.47

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Solution

The fourth proportional to 7,420.38, 11,131.79 and 3,523.47 is: 5,285.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.38 : 11,131.79 = 3,523.47 : x
  2. Step 2: Convert to fraction form
    7,420.38/11,131.79 = 3,523.47/x
  3. Step 3: Cross multiply
    7,420.38x = 11,131.79 × 3,523.47
  4. Step 4: Simplify right side
    7,420.38x = 39,222,572.06
  5. Step 5: Solve for x
    x = 39,222,572.06/7,420.38
  6. Step 6: Final answer
    x = 5,285.79

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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.