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Finding the Fourth Proportional to 17,687.52, 26,507.83 and 12,985.54

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Solution

The fourth proportional to 17,687.52, 26,507.83 and 12,985.54 is: 19,461.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,687.52 : 26,507.83 = 12,985.54 : x
  2. Step 2: Convert to fraction form
    17,687.52/26,507.83 = 12,985.54/x
  3. Step 3: Cross multiply
    17,687.52x = 26,507.83 × 12,985.54
  4. Step 4: Simplify right side
    17,687.52x = 344,218,486.78
  5. Step 5: Solve for x
    x = 344,218,486.78/17,687.52
  6. Step 6: Final answer
    x = 19,461.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.