Home / 7,110.39-9,811.67-3,966.78

Finding the Fourth Proportional to 7,110.39, 9,811.67 and 3,966.78

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Solution

The fourth proportional to 7,110.39, 9,811.67 and 3,966.78 is: 5,473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,110.39 : 9,811.67 = 3,966.78 : x
  2. Step 2: Convert to fraction form
    7,110.39/9,811.67 = 3,966.78/x
  3. Step 3: Cross multiply
    7,110.39x = 9,811.67 × 3,966.78
  4. Step 4: Simplify right side
    7,110.39x = 38,920,716.49
  5. Step 5: Solve for x
    x = 38,920,716.49/7,110.39
  6. Step 6: Final answer
    x = 5,473.78

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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.