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Finding the Fourth Proportional to 6,242.09, 8,617.64 and 4,979.09

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Solution

The fourth proportional to 6,242.09, 8,617.64 and 4,979.09 is: 6,873.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,242.09 : 8,617.64 = 4,979.09 : x
  2. Step 2: Convert to fraction form
    6,242.09/8,617.64 = 4,979.09/x
  3. Step 3: Cross multiply
    6,242.09x = 8,617.64 × 4,979.09
  4. Step 4: Simplify right side
    6,242.09x = 42,908,001.80
  5. Step 5: Solve for x
    x = 42,908,001.80/6,242.09
  6. Step 6: Final answer
    x = 6,873.99

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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.