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Finding the Fourth Proportional to 12,800.64, 19,197.08 and 4,479.11

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Solution

The fourth proportional to 12,800.64, 19,197.08 and 4,479.11 is: 6,717.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,800.64 : 19,197.08 = 4,479.11 : x
  2. Step 2: Convert to fraction form
    12,800.64/19,197.08 = 4,479.11/x
  3. Step 3: Cross multiply
    12,800.64x = 19,197.08 × 4,479.11
  4. Step 4: Simplify right side
    12,800.64x = 85,985,714.62
  5. Step 5: Solve for x
    x = 85,985,714.62/12,800.64
  6. Step 6: Final answer
    x = 6,717.30

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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.