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Finding the Fourth Proportional to 21,333, 29,439.54 and 11,901.56

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Solution

The fourth proportional to 21,333, 29,439.54 and 11,901.56 is: 16,424.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,333 : 29,439.54 = 11,901.56 : x
  2. Step 2: Convert to fraction form
    21,333/29,439.54 = 11,901.56/x
  3. Step 3: Cross multiply
    21,333x = 29,439.54 × 11,901.56
  4. Step 4: Simplify right side
    21,333x = 350,376,451.68
  5. Step 5: Solve for x
    x = 350,376,451.68/21,333
  6. Step 6: Final answer
    x = 16,424.15

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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.