Home / 4,761.45-7,143.89-2,128.74

Finding the Fourth Proportional to 4,761.45, 7,143.89 and 2,128.74

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Solution

The fourth proportional to 4,761.45, 7,143.89 and 2,128.74 is: 3,193.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,761.45 : 7,143.89 = 2,128.74 : x
  2. Step 2: Convert to fraction form
    4,761.45/7,143.89 = 2,128.74/x
  3. Step 3: Cross multiply
    4,761.45x = 7,143.89 × 2,128.74
  4. Step 4: Simplify right side
    4,761.45x = 15,207,438.04
  5. Step 5: Solve for x
    x = 15,207,438.04/4,761.45
  6. Step 6: Final answer
    x = 3,193.87

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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.