Home / 12,639.32-18,943.57-8,942.61

Finding the Fourth Proportional to 12,639.32, 18,943.57 and 8,942.61

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Solution

The fourth proportional to 12,639.32, 18,943.57 and 8,942.61 is: 13,403.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.32 : 18,943.57 = 8,942.61 : x
  2. Step 2: Convert to fraction form
    12,639.32/18,943.57 = 8,942.61/x
  3. Step 3: Cross multiply
    12,639.32x = 18,943.57 × 8,942.61
  4. Step 4: Simplify right side
    12,639.32x = 169,404,958.52
  5. Step 5: Solve for x
    x = 169,404,958.52/12,639.32
  6. Step 6: Final answer
    x = 13,403.01

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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.