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Finding the Fourth Proportional to 15,790.52, 21,790.92 and 8,716.94

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Solution

The fourth proportional to 15,790.52, 21,790.92 and 8,716.94 is: 12,029.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.52 : 21,790.92 = 8,716.94 : x
  2. Step 2: Convert to fraction form
    15,790.52/21,790.92 = 8,716.94/x
  3. Step 3: Cross multiply
    15,790.52x = 21,790.92 × 8,716.94
  4. Step 4: Simplify right side
    15,790.52x = 189,950,033.23
  5. Step 5: Solve for x
    x = 189,950,033.23/15,790.52
  6. Step 6: Final answer
    x = 12,029.38

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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.