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Finding the Fourth Proportional to 5,649.74, 7,796.90 and 3,131.90

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Solution

The fourth proportional to 5,649.74, 7,796.90 and 3,131.90 is: 4,322.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,649.74 : 7,796.90 = 3,131.90 : x
  2. Step 2: Convert to fraction form
    5,649.74/7,796.90 = 3,131.90/x
  3. Step 3: Cross multiply
    5,649.74x = 7,796.90 × 3,131.90
  4. Step 4: Simplify right side
    5,649.74x = 24,419,095.45
  5. Step 5: Solve for x
    x = 24,419,095.45/5,649.74
  6. Step 6: Final answer
    x = 4,322.17

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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.