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Finding the Fourth Proportional to 8,640.66, 12,960.98 and 2,717.52

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Solution

The fourth proportional to 8,640.66, 12,960.98 and 2,717.52 is: 4,076.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.66 : 12,960.98 = 2,717.52 : x
  2. Step 2: Convert to fraction form
    8,640.66/12,960.98 = 2,717.52/x
  3. Step 3: Cross multiply
    8,640.66x = 12,960.98 × 2,717.52
  4. Step 4: Simplify right side
    8,640.66x = 35,221,722.37
  5. Step 5: Solve for x
    x = 35,221,722.37/8,640.66
  6. Step 6: Final answer
    x = 4,076.28

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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.