Home / 8,426.97-12,640.64-2,187.23

Finding the Fourth Proportional to 8,426.97, 12,640.64 and 2,187.23

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Solution

The fourth proportional to 8,426.97, 12,640.64 and 2,187.23 is: 3,280.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.97 : 12,640.64 = 2,187.23 : x
  2. Step 2: Convert to fraction form
    8,426.97/12,640.64 = 2,187.23/x
  3. Step 3: Cross multiply
    8,426.97x = 12,640.64 × 2,187.23
  4. Step 4: Simplify right side
    8,426.97x = 27,647,929.29
  5. Step 5: Solve for x
    x = 27,647,929.29/8,426.97
  6. Step 6: Final answer
    x = 3,280.89

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Double scale
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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.