Home / 9,121.80-13,680.72-2,882.30

Finding the Fourth Proportional to 9,121.80, 13,680.72 and 2,882.30

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Solution

The fourth proportional to 9,121.80, 13,680.72 and 2,882.30 is: 4,322.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.80 : 13,680.72 = 2,882.30 : x
  2. Step 2: Convert to fraction form
    9,121.80/13,680.72 = 2,882.30/x
  3. Step 3: Cross multiply
    9,121.80x = 13,680.72 × 2,882.30
  4. Step 4: Simplify right side
    9,121.80x = 39,431,939.26
  5. Step 5: Solve for x
    x = 39,431,939.26/9,121.80
  6. Step 6: Final answer
    x = 4,322.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.