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Finding the Fourth Proportional to 8,310.90, 11,472.86 and 7,172.04

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Solution

The fourth proportional to 8,310.90, 11,472.86 and 7,172.04 is: 9,900.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,310.90 : 11,472.86 = 7,172.04 : x
  2. Step 2: Convert to fraction form
    8,310.90/11,472.86 = 7,172.04/x
  3. Step 3: Cross multiply
    8,310.90x = 11,472.86 × 7,172.04
  4. Step 4: Simplify right side
    8,310.90x = 82,283,810.83
  5. Step 5: Solve for x
    x = 82,283,810.83/8,310.90
  6. Step 6: Final answer
    x = 9,900.71

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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.