Home / 7,121.45-10,661.13-5,260.20

Finding the Fourth Proportional to 7,121.45, 10,661.13 and 5,260.20

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Solution

The fourth proportional to 7,121.45, 10,661.13 and 5,260.20 is: 7,874.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.45 : 10,661.13 = 5,260.20 : x
  2. Step 2: Convert to fraction form
    7,121.45/10,661.13 = 5,260.20/x
  3. Step 3: Cross multiply
    7,121.45x = 10,661.13 × 5,260.20
  4. Step 4: Simplify right side
    7,121.45x = 56,079,676.03
  5. Step 5: Solve for x
    x = 56,079,676.03/7,121.45
  6. Step 6: Final answer
    x = 7,874.76

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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.