Home / 7,043.82-9,720.96-3,900.21

Finding the Fourth Proportional to 7,043.82, 9,720.96 and 3,900.21

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Solution

The fourth proportional to 7,043.82, 9,720.96 and 3,900.21 is: 5,382.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,043.82 : 9,720.96 = 3,900.21 : x
  2. Step 2: Convert to fraction form
    7,043.82/9,720.96 = 3,900.21/x
  3. Step 3: Cross multiply
    7,043.82x = 9,720.96 × 3,900.21
  4. Step 4: Simplify right side
    7,043.82x = 37,913,785.40
  5. Step 5: Solve for x
    x = 37,913,785.40/7,043.82
  6. Step 6: Final answer
    x = 5,382.56

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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.