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Finding the Fourth Proportional to 7,279.70, 10,927.65 and 3,999.20

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Solution

The fourth proportional to 7,279.70, 10,927.65 and 3,999.20 is: 6,003.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.70 : 10,927.65 = 3,999.20 : x
  2. Step 2: Convert to fraction form
    7,279.70/10,927.65 = 3,999.20/x
  3. Step 3: Cross multiply
    7,279.70x = 10,927.65 × 3,999.20
  4. Step 4: Simplify right side
    7,279.70x = 43,701,857.88
  5. Step 5: Solve for x
    x = 43,701,857.88/7,279.70
  6. Step 6: Final answer
    x = 6,003.25

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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.