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Finding the Fourth Proportional to 7,891.38, 11,837.02 and 3,210.48

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Solution

The fourth proportional to 7,891.38, 11,837.02 and 3,210.48 is: 4,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.38 : 11,837.02 = 3,210.48 : x
  2. Step 2: Convert to fraction form
    7,891.38/11,837.02 = 3,210.48/x
  3. Step 3: Cross multiply
    7,891.38x = 11,837.02 × 3,210.48
  4. Step 4: Simplify right side
    7,891.38x = 38,002,515.97
  5. Step 5: Solve for x
    x = 38,002,515.97/7,891.38
  6. Step 6: Final answer
    x = 4,815.70

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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.