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Finding the Fourth Proportional to 6,294.80, 8,678.80 and 3,936.08

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Solution

The fourth proportional to 6,294.80, 8,678.80 and 3,936.08 is: 5,426.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,294.80 : 8,678.80 = 3,936.08 : x
  2. Step 2: Convert to fraction form
    6,294.80/8,678.80 = 3,936.08/x
  3. Step 3: Cross multiply
    6,294.80x = 8,678.80 × 3,936.08
  4. Step 4: Simplify right side
    6,294.80x = 34,160,451.10
  5. Step 5: Solve for x
    x = 34,160,451.10/6,294.80
  6. Step 6: Final answer
    x = 5,426.77

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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.