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Finding the Fourth Proportional to 12,650.64, 18,968.64 and 5,246.64

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Solution

The fourth proportional to 12,650.64, 18,968.64 and 5,246.64 is: 7,866.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,650.64 : 18,968.64 = 5,246.64 : x
  2. Step 2: Convert to fraction form
    12,650.64/18,968.64 = 5,246.64/x
  3. Step 3: Cross multiply
    12,650.64x = 18,968.64 × 5,246.64
  4. Step 4: Simplify right side
    12,650.64x = 99,521,625.37
  5. Step 5: Solve for x
    x = 99,521,625.37/12,650.64
  6. Step 6: Final answer
    x = 7,866.92

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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.