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Finding the Fourth Proportional to 7,479.76, 11,218.84 and 3,319.84

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Solution

The fourth proportional to 7,479.76, 11,218.84 and 3,319.84 is: 4,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.76 : 11,218.84 = 3,319.84 : x
  2. Step 2: Convert to fraction form
    7,479.76/11,218.84 = 3,319.84/x
  3. Step 3: Cross multiply
    7,479.76x = 11,218.84 × 3,319.84
  4. Step 4: Simplify right side
    7,479.76x = 37,244,753.79
  5. Step 5: Solve for x
    x = 37,244,753.79/7,479.76
  6. Step 6: Final answer
    x = 4,979.40

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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.