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Finding the Fourth Proportional to 15,755.54, 21,741.83 and 9,787.09

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Solution

The fourth proportional to 15,755.54, 21,741.83 and 9,787.09 is: 13,505.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.54 : 21,741.83 = 9,787.09 : x
  2. Step 2: Convert to fraction form
    15,755.54/21,741.83 = 9,787.09/x
  3. Step 3: Cross multiply
    15,755.54x = 21,741.83 × 9,787.09
  4. Step 4: Simplify right side
    15,755.54x = 212,789,246.97
  5. Step 5: Solve for x
    x = 212,789,246.97/15,755.54
  6. Step 6: Final answer
    x = 13,505.68

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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.