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Finding the Fourth Proportional to 8,669.60, 13,004.40 and 3,479.20

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Solution

The fourth proportional to 8,669.60, 13,004.40 and 3,479.20 is: 5,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.60 : 13,004.40 = 3,479.20 : x
  2. Step 2: Convert to fraction form
    8,669.60/13,004.40 = 3,479.20/x
  3. Step 3: Cross multiply
    8,669.60x = 13,004.40 × 3,479.20
  4. Step 4: Simplify right side
    8,669.60x = 45,244,908.48
  5. Step 5: Solve for x
    x = 45,244,908.48/8,669.60
  6. Step 6: Final answer
    x = 5,218.80

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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.