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Finding the Fourth Proportional to 9,375.75, 12,966.48 and 8,379.45

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Solution

The fourth proportional to 9,375.75, 12,966.48 and 8,379.45 is: 11,588.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,375.75 : 12,966.48 = 8,379.45 : x
  2. Step 2: Convert to fraction form
    9,375.75/12,966.48 = 8,379.45/x
  3. Step 3: Cross multiply
    9,375.75x = 12,966.48 × 8,379.45
  4. Step 4: Simplify right side
    9,375.75x = 108,651,970.84
  5. Step 5: Solve for x
    x = 108,651,970.84/9,375.75
  6. Step 6: Final answer
    x = 11,588.62

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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.