Home / 12,936.16-19,385.70-7,378

Finding the Fourth Proportional to 12,936.16, 19,385.70 and 7,378

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Solution

The fourth proportional to 12,936.16, 19,385.70 and 7,378 is: 11,056.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.16 : 19,385.70 = 7,378 : x
  2. Step 2: Convert to fraction form
    12,936.16/19,385.70 = 7,378/x
  3. Step 3: Cross multiply
    12,936.16x = 19,385.70 × 7,378
  4. Step 4: Simplify right side
    12,936.16x = 143,027,694.60
  5. Step 5: Solve for x
    x = 143,027,694.60/12,936.16
  6. Step 6: Final answer
    x = 11,056.43

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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.