Home / 12,631.84-18,936.24-7,156

Finding the Fourth Proportional to 12,631.84, 18,936.24 and 7,156

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Solution

The fourth proportional to 12,631.84, 18,936.24 and 7,156 is: 10,727.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.84 : 18,936.24 = 7,156 : x
  2. Step 2: Convert to fraction form
    12,631.84/18,936.24 = 7,156/x
  3. Step 3: Cross multiply
    12,631.84x = 18,936.24 × 7,156
  4. Step 4: Simplify right side
    12,631.84x = 135,507,733.44
  5. Step 5: Solve for x
    x = 135,507,733.44/12,631.84
  6. Step 6: Final answer
    x = 10,727.47

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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.