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Finding the Fourth Proportional to 8,561.88, 12,813.66 and 6,622.74

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Solution

The fourth proportional to 8,561.88, 12,813.66 and 6,622.74 is: 9,911.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,561.88 : 12,813.66 = 6,622.74 : x
  2. Step 2: Convert to fraction form
    8,561.88/12,813.66 = 6,622.74/x
  3. Step 3: Cross multiply
    8,561.88x = 12,813.66 × 6,622.74
  4. Step 4: Simplify right side
    8,561.88x = 84,861,538.63
  5. Step 5: Solve for x
    x = 84,861,538.63/8,561.88
  6. Step 6: Final answer
    x = 9,911.55

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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.