Home / 7,107.28-9,808.08-3,920.68

Finding the Fourth Proportional to 7,107.28, 9,808.08 and 3,920.68

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Solution

The fourth proportional to 7,107.28, 9,808.08 and 3,920.68 is: 5,410.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,107.28 : 9,808.08 = 3,920.68 : x
  2. Step 2: Convert to fraction form
    7,107.28/9,808.08 = 3,920.68/x
  3. Step 3: Cross multiply
    7,107.28x = 9,808.08 × 3,920.68
  4. Step 4: Simplify right side
    7,107.28x = 38,454,357.81
  5. Step 5: Solve for x
    x = 38,454,357.81/7,107.28
  6. Step 6: Final answer
    x = 5,410.56

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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.