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Finding the Fourth Proportional to 12,315.49, 16,992.36 and 6,936.89

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Solution

The fourth proportional to 12,315.49, 16,992.36 and 6,936.89 is: 9,571.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.49 : 16,992.36 = 6,936.89 : x
  2. Step 2: Convert to fraction form
    12,315.49/16,992.36 = 6,936.89/x
  3. Step 3: Cross multiply
    12,315.49x = 16,992.36 × 6,936.89
  4. Step 4: Simplify right side
    12,315.49x = 117,874,167.17
  5. Step 5: Solve for x
    x = 117,874,167.17/12,315.49
  6. Step 6: Final answer
    x = 9,571.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.