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Finding the Fourth Proportional to 8,172.70, 12,242.64 and 6,917.92

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Solution

The fourth proportional to 8,172.70, 12,242.64 and 6,917.92 is: 10,362.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.70 : 12,242.64 = 6,917.92 : x
  2. Step 2: Convert to fraction form
    8,172.70/12,242.64 = 6,917.92/x
  3. Step 3: Cross multiply
    8,172.70x = 12,242.64 × 6,917.92
  4. Step 4: Simplify right side
    8,172.70x = 84,693,604.11
  5. Step 5: Solve for x
    x = 84,693,604.11/8,172.70
  6. Step 6: Final answer
    x = 10,362.99

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1.5x scale

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.