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Finding the Fourth Proportional to 21,355, 29,472.84 and 11,924.08

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Solution

The fourth proportional to 21,355, 29,472.84 and 11,924.08 is: 16,456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355 : 29,472.84 = 11,924.08 : x
  2. Step 2: Convert to fraction form
    21,355/29,472.84 = 11,924.08/x
  3. Step 3: Cross multiply
    21,355x = 29,472.84 × 11,924.08
  4. Step 4: Simplify right side
    21,355x = 351,436,501.99
  5. Step 5: Solve for x
    x = 351,436,501.99/21,355
  6. Step 6: Final answer
    x = 16,456.87

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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.