Home / 7,915.21-11,869.73-2,982.15

Finding the Fourth Proportional to 7,915.21, 11,869.73 and 2,982.15

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Solution

The fourth proportional to 7,915.21, 11,869.73 and 2,982.15 is: 4,472.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.21 : 11,869.73 = 2,982.15 : x
  2. Step 2: Convert to fraction form
    7,915.21/11,869.73 = 2,982.15/x
  3. Step 3: Cross multiply
    7,915.21x = 11,869.73 × 2,982.15
  4. Step 4: Simplify right side
    7,915.21x = 35,397,311.59
  5. Step 5: Solve for x
    x = 35,397,311.59/7,915.21
  6. Step 6: Final answer
    x = 4,472.06

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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.