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Finding the Fourth Proportional to 9,382.37, 12,920.11 and 8,387.28

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Solution

The fourth proportional to 9,382.37, 12,920.11 and 8,387.28 is: 11,549.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,382.37 : 12,920.11 = 8,387.28 : x
  2. Step 2: Convert to fraction form
    9,382.37/12,920.11 = 8,387.28/x
  3. Step 3: Cross multiply
    9,382.37x = 12,920.11 × 8,387.28
  4. Step 4: Simplify right side
    9,382.37x = 108,364,559.23
  5. Step 5: Solve for x
    x = 108,364,559.23/9,382.37
  6. Step 6: Final answer
    x = 11,549.81

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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.