Home / 5,487.12-7,571.52-3,129.12

Finding the Fourth Proportional to 5,487.12, 7,571.52 and 3,129.12

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Solution

The fourth proportional to 5,487.12, 7,571.52 and 3,129.12 is: 4,317.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.12 : 7,571.52 = 3,129.12 : x
  2. Step 2: Convert to fraction form
    5,487.12/7,571.52 = 3,129.12/x
  3. Step 3: Cross multiply
    5,487.12x = 7,571.52 × 3,129.12
  4. Step 4: Simplify right side
    5,487.12x = 23,692,194.66
  5. Step 5: Solve for x
    x = 23,692,194.66/5,487.12
  6. Step 6: Final answer
    x = 4,317.78

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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.