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Finding the Fourth Proportional to 15,790.73, 21,790.27 and 8,619.22

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Solution

The fourth proportional to 15,790.73, 21,790.27 and 8,619.22 is: 11,894.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.73 : 21,790.27 = 8,619.22 : x
  2. Step 2: Convert to fraction form
    15,790.73/21,790.27 = 8,619.22/x
  3. Step 3: Cross multiply
    15,790.73x = 21,790.27 × 8,619.22
  4. Step 4: Simplify right side
    15,790.73x = 187,815,169.00
  5. Step 5: Solve for x
    x = 187,815,169.00/15,790.73
  6. Step 6: Final answer
    x = 11,894.02

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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.