Home / 5,487.21-7,571.88-3,129.30

Finding the Fourth Proportional to 5,487.21, 7,571.88 and 3,129.30

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Solution

The fourth proportional to 5,487.21, 7,571.88 and 3,129.30 is: 4,318.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.21 : 7,571.88 = 3,129.30 : x
  2. Step 2: Convert to fraction form
    5,487.21/7,571.88 = 3,129.30/x
  3. Step 3: Cross multiply
    5,487.21x = 7,571.88 × 3,129.30
  4. Step 4: Simplify right side
    5,487.21x = 23,694,684.08
  5. Step 5: Solve for x
    x = 23,694,684.08/5,487.21
  6. Step 6: Final answer
    x = 4,318.17

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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.