Home / 9,311.71-12,850.95-5,120.77

Finding the Fourth Proportional to 9,311.71, 12,850.95 and 5,120.77

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Solution

The fourth proportional to 9,311.71, 12,850.95 and 5,120.77 is: 7,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,311.71 : 12,850.95 = 5,120.77 : x
  2. Step 2: Convert to fraction form
    9,311.71/12,850.95 = 5,120.77/x
  3. Step 3: Cross multiply
    9,311.71x = 12,850.95 × 5,120.77
  4. Step 4: Simplify right side
    9,311.71x = 65,806,759.23
  5. Step 5: Solve for x
    x = 65,806,759.23/9,311.71
  6. Step 6: Final answer
    x = 7,067.10

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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.