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Finding the Fourth Proportional to 8,678.35, 12,998.07 and 6,724.63

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Solution

The fourth proportional to 8,678.35, 12,998.07 and 6,724.63 is: 10,071.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.35 : 12,998.07 = 6,724.63 : x
  2. Step 2: Convert to fraction form
    8,678.35/12,998.07 = 6,724.63/x
  3. Step 3: Cross multiply
    8,678.35x = 12,998.07 × 6,724.63
  4. Step 4: Simplify right side
    8,678.35x = 87,407,211.46
  5. Step 5: Solve for x
    x = 87,407,211.46/8,678.35
  6. Step 6: Final answer
    x = 10,071.87

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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.