Home / 9,081.80-13,622.70-5,145.20

Finding the Fourth Proportional to 9,081.80, 13,622.70 and 5,145.20

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Solution

The fourth proportional to 9,081.80, 13,622.70 and 5,145.20 is: 7,717.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,081.80 : 13,622.70 = 5,145.20 : x
  2. Step 2: Convert to fraction form
    9,081.80/13,622.70 = 5,145.20/x
  3. Step 3: Cross multiply
    9,081.80x = 13,622.70 × 5,145.20
  4. Step 4: Simplify right side
    9,081.80x = 70,091,516.04
  5. Step 5: Solve for x
    x = 70,091,516.04/9,081.80
  6. Step 6: Final answer
    x = 7,717.80

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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.