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Finding the Fourth Proportional to 21,231, 29,298.78 and 11,801.43

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Solution

The fourth proportional to 21,231, 29,298.78 and 11,801.43 is: 16,285.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231 : 29,298.78 = 11,801.43 : x
  2. Step 2: Convert to fraction form
    21,231/29,298.78 = 11,801.43/x
  3. Step 3: Cross multiply
    21,231x = 29,298.78 × 11,801.43
  4. Step 4: Simplify right side
    21,231x = 345,767,501.26
  5. Step 5: Solve for x
    x = 345,767,501.26/21,231
  6. Step 6: Final answer
    x = 16,285.97

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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.