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Finding the Fourth Proportional to 6,667.76, 9,199.95 and 3,979.11

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Solution

The fourth proportional to 6,667.76, 9,199.95 and 3,979.11 is: 5,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,667.76 : 9,199.95 = 3,979.11 : x
  2. Step 2: Convert to fraction form
    6,667.76/9,199.95 = 3,979.11/x
  3. Step 3: Cross multiply
    6,667.76x = 9,199.95 × 3,979.11
  4. Step 4: Simplify right side
    6,667.76x = 36,607,632.62
  5. Step 5: Solve for x
    x = 36,607,632.62/6,667.76
  6. Step 6: Final answer
    x = 5,490.25

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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.