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Finding the Fourth Proportional to 13,133.86, 18,119.01 and 8,651.86

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Solution

The fourth proportional to 13,133.86, 18,119.01 and 8,651.86 is: 11,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,133.86 : 18,119.01 = 8,651.86 : x
  2. Step 2: Convert to fraction form
    13,133.86/18,119.01 = 8,651.86/x
  3. Step 3: Cross multiply
    13,133.86x = 18,119.01 × 8,651.86
  4. Step 4: Simplify right side
    13,133.86x = 156,763,137.86
  5. Step 5: Solve for x
    x = 156,763,137.86/13,133.86
  6. Step 6: Final answer
    x = 11,935.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.