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Finding the Fourth Proportional to 8,622.33, 12,895.71 and 7,991.80

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Solution

The fourth proportional to 8,622.33, 12,895.71 and 7,991.80 is: 11,952.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.33 : 12,895.71 = 7,991.80 : x
  2. Step 2: Convert to fraction form
    8,622.33/12,895.71 = 7,991.80/x
  3. Step 3: Cross multiply
    8,622.33x = 12,895.71 × 7,991.80
  4. Step 4: Simplify right side
    8,622.33x = 103,059,935.18
  5. Step 5: Solve for x
    x = 103,059,935.18/8,622.33
  6. Step 6: Final answer
    x = 11,952.68

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1.5x scale

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.