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Finding the Fourth Proportional to 8,173, 11,279.70 and 4,861

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Solution

The fourth proportional to 8,173, 11,279.70 and 4,861 is: 6,708.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,173 : 11,279.70 = 4,861 : x
  2. Step 2: Convert to fraction form
    8,173/11,279.70 = 4,861/x
  3. Step 3: Cross multiply
    8,173x = 11,279.70 × 4,861
  4. Step 4: Simplify right side
    8,173x = 54,830,621.70
  5. Step 5: Solve for x
    x = 54,830,621.70/8,173
  6. Step 6: Final answer
    x = 6,708.75

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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.