Home / 6,921.75-9,553.10-4,128.87

Finding the Fourth Proportional to 6,921.75, 9,553.10 and 4,128.87

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Solution

The fourth proportional to 6,921.75, 9,553.10 and 4,128.87 is: 5,698.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.75 : 9,553.10 = 4,128.87 : x
  2. Step 2: Convert to fraction form
    6,921.75/9,553.10 = 4,128.87/x
  3. Step 3: Cross multiply
    6,921.75x = 9,553.10 × 4,128.87
  4. Step 4: Simplify right side
    6,921.75x = 39,443,487.35
  5. Step 5: Solve for x
    x = 39,443,487.35/6,921.75
  6. Step 6: Final answer
    x = 5,698.48

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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.