Home / 9,311.45-12,849.78-5,119.70

Finding the Fourth Proportional to 9,311.45, 12,849.78 and 5,119.70

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Solution

The fourth proportional to 9,311.45, 12,849.78 and 5,119.70 is: 7,065.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,311.45 : 12,849.78 = 5,119.70 : x
  2. Step 2: Convert to fraction form
    9,311.45/12,849.78 = 5,119.70/x
  3. Step 3: Cross multiply
    9,311.45x = 12,849.78 × 5,119.70
  4. Step 4: Simplify right side
    9,311.45x = 65,786,954.42
  5. Step 5: Solve for x
    x = 65,786,954.42/9,311.45
  6. Step 6: Final answer
    x = 7,065.17

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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.