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Finding the Fourth Proportional to 15,896.27, 21,930 and 9,605

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Solution

The fourth proportional to 15,896.27, 21,930 and 9,605 is: 13,250.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,896.27 : 21,930 = 9,605 : x
  2. Step 2: Convert to fraction form
    15,896.27/21,930 = 9,605/x
  3. Step 3: Cross multiply
    15,896.27x = 21,930 × 9,605
  4. Step 4: Simplify right side
    15,896.27x = 210,637,650
  5. Step 5: Solve for x
    x = 210,637,650/15,896.27
  6. Step 6: Final answer
    x = 13,250.76

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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.