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Finding the Fourth Proportional to 8,320.40, 12,479.24 and 2,773.79

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Solution

The fourth proportional to 8,320.40, 12,479.24 and 2,773.79 is: 4,160.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.40 : 12,479.24 = 2,773.79 : x
  2. Step 2: Convert to fraction form
    8,320.40/12,479.24 = 2,773.79/x
  3. Step 3: Cross multiply
    8,320.40x = 12,479.24 × 2,773.79
  4. Step 4: Simplify right side
    8,320.40x = 34,614,735.66
  5. Step 5: Solve for x
    x = 34,614,735.66/8,320.40
  6. Step 6: Final answer
    x = 4,160.23

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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.