Home / 7,147.45-9,863.46-4,122.56

Finding the Fourth Proportional to 7,147.45, 9,863.46 and 4,122.56

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Solution

The fourth proportional to 7,147.45, 9,863.46 and 4,122.56 is: 5,689.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,147.45 : 9,863.46 = 4,122.56 : x
  2. Step 2: Convert to fraction form
    7,147.45/9,863.46 = 4,122.56/x
  3. Step 3: Cross multiply
    7,147.45x = 9,863.46 × 4,122.56
  4. Step 4: Simplify right side
    7,147.45x = 40,662,705.66
  5. Step 5: Solve for x
    x = 40,662,705.66/7,147.45
  6. Step 6: Final answer
    x = 5,689.12

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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.