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Finding the Fourth Proportional to 12,651.18, 18,989.76 and 8,299.86

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Solution

The fourth proportional to 12,651.18, 18,989.76 and 8,299.86 is: 12,458.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.18 : 18,989.76 = 8,299.86 : x
  2. Step 2: Convert to fraction form
    12,651.18/18,989.76 = 8,299.86/x
  3. Step 3: Cross multiply
    12,651.18x = 18,989.76 × 8,299.86
  4. Step 4: Simplify right side
    12,651.18x = 157,612,349.43
  5. Step 5: Solve for x
    x = 157,612,349.43/12,651.18
  6. Step 6: Final answer
    x = 12,458.31

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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.