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Finding the Fourth Proportional to 9,372.45, 12,943.67 and 8,107.43

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Solution

The fourth proportional to 9,372.45, 12,943.67 and 8,107.43 is: 11,196.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,372.45 : 12,943.67 = 8,107.43 : x
  2. Step 2: Convert to fraction form
    9,372.45/12,943.67 = 8,107.43/x
  3. Step 3: Cross multiply
    9,372.45x = 12,943.67 × 8,107.43
  4. Step 4: Simplify right side
    9,372.45x = 104,939,890.29
  5. Step 5: Solve for x
    x = 104,939,890.29/9,372.45
  6. Step 6: Final answer
    x = 11,196.63

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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.