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Finding the Fourth Proportional to 8,678.66, 11,975.87 and 4,902.20

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Solution

The fourth proportional to 8,678.66, 11,975.87 and 4,902.20 is: 6,764.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.66 : 11,975.87 = 4,902.20 : x
  2. Step 2: Convert to fraction form
    8,678.66/11,975.87 = 4,902.20/x
  3. Step 3: Cross multiply
    8,678.66x = 11,975.87 × 4,902.20
  4. Step 4: Simplify right side
    8,678.66x = 58,708,070.43
  5. Step 5: Solve for x
    x = 58,708,070.43/8,678.66
  6. Step 6: Final answer
    x = 6,764.65

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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.