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Finding the Fourth Proportional to 8,640.49, 11,924.15 and 4,914.73

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Solution

The fourth proportional to 8,640.49, 11,924.15 and 4,914.73 is: 6,782.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.49 : 11,924.15 = 4,914.73 : x
  2. Step 2: Convert to fraction form
    8,640.49/11,924.15 = 4,914.73/x
  3. Step 3: Cross multiply
    8,640.49x = 11,924.15 × 4,914.73
  4. Step 4: Simplify right side
    8,640.49x = 58,603,953.16
  5. Step 5: Solve for x
    x = 58,603,953.16/8,640.49
  6. Step 6: Final answer
    x = 6,782.48

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Double scale
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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.