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Finding the Fourth Proportional to 8,678.46, 11,968.08 and 5,696.88

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Solution

The fourth proportional to 8,678.46, 11,968.08 and 5,696.88 is: 7,856.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.46 : 11,968.08 = 5,696.88 : x
  2. Step 2: Convert to fraction form
    8,678.46/11,968.08 = 5,696.88/x
  3. Step 3: Cross multiply
    8,678.46x = 11,968.08 × 5,696.88
  4. Step 4: Simplify right side
    8,678.46x = 68,180,715.59
  5. Step 5: Solve for x
    x = 68,180,715.59/8,678.46
  6. Step 6: Final answer
    x = 7,856.32

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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.