Home / 6,975.13-9,625.50-3,990.78

Finding the Fourth Proportional to 6,975.13, 9,625.50 and 3,990.78

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Solution

The fourth proportional to 6,975.13, 9,625.50 and 3,990.78 is: 5,507.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,975.13 : 9,625.50 = 3,990.78 : x
  2. Step 2: Convert to fraction form
    6,975.13/9,625.50 = 3,990.78/x
  3. Step 3: Cross multiply
    6,975.13x = 9,625.50 × 3,990.78
  4. Step 4: Simplify right side
    6,975.13x = 38,413,252.89
  5. Step 5: Solve for x
    x = 38,413,252.89/6,975.13
  6. Step 6: Final answer
    x = 5,507.17

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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.