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Finding the Fourth Proportional to 12,398.34, 18,491.46 and 11,960.94

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Solution

The fourth proportional to 12,398.34, 18,491.46 and 11,960.94 is: 17,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.34 : 18,491.46 = 11,960.94 : x
  2. Step 2: Convert to fraction form
    12,398.34/18,491.46 = 11,960.94/x
  3. Step 3: Cross multiply
    12,398.34x = 18,491.46 × 11,960.94
  4. Step 4: Simplify right side
    12,398.34x = 221,175,243.57
  5. Step 5: Solve for x
    x = 221,175,243.57/12,398.34
  6. Step 6: Final answer
    x = 17,839.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.