Home / 5,128.75-7,694.21-1,666.27

Finding the Fourth Proportional to 5,128.75, 7,694.21 and 1,666.27

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Solution

The fourth proportional to 5,128.75, 7,694.21 and 1,666.27 is: 2,499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.75 : 7,694.21 = 1,666.27 : x
  2. Step 2: Convert to fraction form
    5,128.75/7,694.21 = 1,666.27/x
  3. Step 3: Cross multiply
    5,128.75x = 7,694.21 × 1,666.27
  4. Step 4: Simplify right side
    5,128.75x = 12,820,631.30
  5. Step 5: Solve for x
    x = 12,820,631.30/5,128.75
  6. Step 6: Final answer
    x = 2,499.76

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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.