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Finding the Fourth Proportional to 12,651.32, 18,972.93 and 5,986.91

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Solution

The fourth proportional to 12,651.32, 18,972.93 and 5,986.91 is: 8,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.32 : 18,972.93 = 5,986.91 : x
  2. Step 2: Convert to fraction form
    12,651.32/18,972.93 = 5,986.91/x
  3. Step 3: Cross multiply
    12,651.32x = 18,972.93 × 5,986.91
  4. Step 4: Simplify right side
    12,651.32x = 113,589,224.35
  5. Step 5: Solve for x
    x = 113,589,224.35/12,651.32
  6. Step 6: Final answer
    x = 8,978.45

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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.