Home / 7,120.31-9,825.97-3,933.81

Finding the Fourth Proportional to 7,120.31, 9,825.97 and 3,933.81

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Solution

The fourth proportional to 7,120.31, 9,825.97 and 3,933.81 is: 5,428.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.31 : 9,825.97 = 3,933.81 : x
  2. Step 2: Convert to fraction form
    7,120.31/9,825.97 = 3,933.81/x
  3. Step 3: Cross multiply
    7,120.31x = 9,825.97 × 3,933.81
  4. Step 4: Simplify right side
    7,120.31x = 38,653,499.05
  5. Step 5: Solve for x
    x = 38,653,499.05/7,120.31
  6. Step 6: Final answer
    x = 5,428.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.