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Finding the Fourth Proportional to 21,963.67, 30,309.81 and 11,892.11

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Solution

The fourth proportional to 21,963.67, 30,309.81 and 11,892.11 is: 16,411.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,963.67 : 30,309.81 = 11,892.11 : x
  2. Step 2: Convert to fraction form
    21,963.67/30,309.81 = 11,892.11/x
  3. Step 3: Cross multiply
    21,963.67x = 30,309.81 × 11,892.11
  4. Step 4: Simplify right side
    21,963.67x = 360,447,670.37
  5. Step 5: Solve for x
    x = 360,447,670.37/21,963.67
  6. Step 6: Final answer
    x = 16,411.09

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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.