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Finding the Fourth Proportional to 6,810.45, 9,398.63 and 3,979.88

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Solution

The fourth proportional to 6,810.45, 9,398.63 and 3,979.88 is: 5,492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,810.45 : 9,398.63 = 3,979.88 : x
  2. Step 2: Convert to fraction form
    6,810.45/9,398.63 = 3,979.88/x
  3. Step 3: Cross multiply
    6,810.45x = 9,398.63 × 3,979.88
  4. Step 4: Simplify right side
    6,810.45x = 37,405,470.63
  5. Step 5: Solve for x
    x = 37,405,470.63/6,810.45
  6. Step 6: Final answer
    x = 5,492.36

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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.