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Finding the Fourth Proportional to 7,276.70, 10,915.11 and 3,988.00

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Solution

The fourth proportional to 7,276.70, 10,915.11 and 3,988.00 is: 5,982.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,276.70 : 10,915.11 = 3,988.00 : x
  2. Step 2: Convert to fraction form
    7,276.70/10,915.11 = 3,988.00/x
  3. Step 3: Cross multiply
    7,276.70x = 10,915.11 × 3,988.00
  4. Step 4: Simplify right side
    7,276.70x = 43,529,384.16
  5. Step 5: Solve for x
    x = 43,529,384.16/7,276.70
  6. Step 6: Final answer
    x = 5,982.03

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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.