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Finding the Fourth Proportional to 9,309.70, 13,971.87 and 8,216.26

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Solution

The fourth proportional to 9,309.70, 13,971.87 and 8,216.26 is: 12,330.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,309.70 : 13,971.87 = 8,216.26 : x
  2. Step 2: Convert to fraction form
    9,309.70/13,971.87 = 8,216.26/x
  3. Step 3: Cross multiply
    9,309.70x = 13,971.87 × 8,216.26
  4. Step 4: Simplify right side
    9,309.70x = 114,796,516.61
  5. Step 5: Solve for x
    x = 114,796,516.61/9,309.70
  6. Step 6: Final answer
    x = 12,330.85

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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.