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Finding the Fourth Proportional to 15,205.07, 20,983.09 and 8,490.77

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Solution

The fourth proportional to 15,205.07, 20,983.09 and 8,490.77 is: 11,717.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,205.07 : 20,983.09 = 8,490.77 : x
  2. Step 2: Convert to fraction form
    15,205.07/20,983.09 = 8,490.77/x
  3. Step 3: Cross multiply
    15,205.07x = 20,983.09 × 8,490.77
  4. Step 4: Simplify right side
    15,205.07x = 178,162,664.76
  5. Step 5: Solve for x
    x = 178,162,664.76/15,205.07
  6. Step 6: Final answer
    x = 11,717.32

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.