Home / 8,426.79-12,640.09-2,186.77

Finding the Fourth Proportional to 8,426.79, 12,640.09 and 2,186.77

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Solution

The fourth proportional to 8,426.79, 12,640.09 and 2,186.77 is: 3,280.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.79 : 12,640.09 = 2,186.77 : x
  2. Step 2: Convert to fraction form
    8,426.79/12,640.09 = 2,186.77/x
  3. Step 3: Cross multiply
    8,426.79x = 12,640.09 × 2,186.77
  4. Step 4: Simplify right side
    8,426.79x = 27,640,969.61
  5. Step 5: Solve for x
    x = 27,640,969.61/8,426.79
  6. Step 6: Final answer
    x = 3,280.13

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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.