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Finding the Fourth Proportional to 12,644.10, 18,966.78 and 4,323.78

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Solution

The fourth proportional to 12,644.10, 18,966.78 and 4,323.78 is: 6,485.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,644.10 : 18,966.78 = 4,323.78 : x
  2. Step 2: Convert to fraction form
    12,644.10/18,966.78 = 4,323.78/x
  3. Step 3: Cross multiply
    12,644.10x = 18,966.78 × 4,323.78
  4. Step 4: Simplify right side
    12,644.10x = 82,008,184.03
  5. Step 5: Solve for x
    x = 82,008,184.03/12,644.10
  6. Step 6: Final answer
    x = 6,485.89

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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.