Home / 6,921.90-9,553.95-3,939.57

Finding the Fourth Proportional to 6,921.90, 9,553.95 and 3,939.57

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Solution

The fourth proportional to 6,921.90, 9,553.95 and 3,939.57 is: 5,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.90 : 9,553.95 = 3,939.57 : x
  2. Step 2: Convert to fraction form
    6,921.90/9,553.95 = 3,939.57/x
  3. Step 3: Cross multiply
    6,921.90x = 9,553.95 × 3,939.57
  4. Step 4: Simplify right side
    6,921.90x = 37,638,454.80
  5. Step 5: Solve for x
    x = 37,638,454.80/6,921.90
  6. Step 6: Final answer
    x = 5,437.59

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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.