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Finding the Fourth Proportional to 9,359.12, 12,886.11 and 7,939.87

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Solution

The fourth proportional to 9,359.12, 12,886.11 and 7,939.87 is: 10,932.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,359.12 : 12,886.11 = 7,939.87 : x
  2. Step 2: Convert to fraction form
    9,359.12/12,886.11 = 7,939.87/x
  3. Step 3: Cross multiply
    9,359.12x = 12,886.11 × 7,939.87
  4. Step 4: Simplify right side
    9,359.12x = 102,314,005.99
  5. Step 5: Solve for x
    x = 102,314,005.99/9,359.12
  6. Step 6: Final answer
    x = 10,932.01

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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.