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Finding the Fourth Proportional to 8,640.73, 11,924.81 and 4,812.87

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Solution

The fourth proportional to 8,640.73, 11,924.81 and 4,812.87 is: 6,642.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.73 : 11,924.81 = 4,812.87 : x
  2. Step 2: Convert to fraction form
    8,640.73/11,924.81 = 4,812.87/x
  3. Step 3: Cross multiply
    8,640.73x = 11,924.81 × 4,812.87
  4. Step 4: Simplify right side
    8,640.73x = 57,392,560.30
  5. Step 5: Solve for x
    x = 57,392,560.30/8,640.73
  6. Step 6: Final answer
    x = 6,642.10

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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.