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Finding the Fourth Proportional to 15,912.84, 21,976.03 and 11,927.64

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Solution

The fourth proportional to 15,912.84, 21,976.03 and 11,927.64 is: 16,472.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,912.84 : 21,976.03 = 11,927.64 : x
  2. Step 2: Convert to fraction form
    15,912.84/21,976.03 = 11,927.64/x
  3. Step 3: Cross multiply
    15,912.84x = 21,976.03 × 11,927.64
  4. Step 4: Simplify right side
    15,912.84x = 262,122,174.47
  5. Step 5: Solve for x
    x = 262,122,174.47/15,912.84
  6. Step 6: Final answer
    x = 16,472.37

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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.