Home / 7,980.28-11,013.32-5,286.85

Finding the Fourth Proportional to 7,980.28, 11,013.32 and 5,286.85

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Solution

The fourth proportional to 7,980.28, 11,013.32 and 5,286.85 is: 7,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.28 : 11,013.32 = 5,286.85 : x
  2. Step 2: Convert to fraction form
    7,980.28/11,013.32 = 5,286.85/x
  3. Step 3: Cross multiply
    7,980.28x = 11,013.32 × 5,286.85
  4. Step 4: Simplify right side
    7,980.28x = 58,225,770.84
  5. Step 5: Solve for x
    x = 58,225,770.84/7,980.28
  6. Step 6: Final answer
    x = 7,296.21

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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.