Home / 12,629.60-18,922.80-8,007.20

Finding the Fourth Proportional to 12,629.60, 18,922.80 and 8,007.20

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Solution

The fourth proportional to 12,629.60, 18,922.80 and 8,007.20 is: 11,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.60 : 18,922.80 = 8,007.20 : x
  2. Step 2: Convert to fraction form
    12,629.60/18,922.80 = 8,007.20/x
  3. Step 3: Cross multiply
    12,629.60x = 18,922.80 × 8,007.20
  4. Step 4: Simplify right side
    12,629.60x = 151,518,644.16
  5. Step 5: Solve for x
    x = 151,518,644.16/12,629.60
  6. Step 6: Final answer
    x = 11,997.11

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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.