Home / 7,687.81-11,521.05-3,517.39

Finding the Fourth Proportional to 7,687.81, 11,521.05 and 3,517.39

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Solution

The fourth proportional to 7,687.81, 11,521.05 and 3,517.39 is: 5,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.81 : 11,521.05 = 3,517.39 : x
  2. Step 2: Convert to fraction form
    7,687.81/11,521.05 = 3,517.39/x
  3. Step 3: Cross multiply
    7,687.81x = 11,521.05 × 3,517.39
  4. Step 4: Simplify right side
    7,687.81x = 40,524,026.06
  5. Step 5: Solve for x
    x = 40,524,026.06/7,687.81
  6. Step 6: Final answer
    x = 5,271.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.