Home / 7,120.29-9,826.13-3,933.75

Finding the Fourth Proportional to 7,120.29, 9,826.13 and 3,933.75

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Solution

The fourth proportional to 7,120.29, 9,826.13 and 3,933.75 is: 5,428.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.29 : 9,826.13 = 3,933.75 : x
  2. Step 2: Convert to fraction form
    7,120.29/9,826.13 = 3,933.75/x
  3. Step 3: Cross multiply
    7,120.29x = 9,826.13 × 3,933.75
  4. Step 4: Simplify right side
    7,120.29x = 38,653,548.72
  5. Step 5: Solve for x
    x = 38,653,548.72/7,120.29
  6. Step 6: Final answer
    x = 5,428.65

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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.