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Finding the Fourth Proportional to 12,695.63, 17,515.91 and 8,222.81

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Solution

The fourth proportional to 12,695.63, 17,515.91 and 8,222.81 is: 11,344.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.63 : 17,515.91 = 8,222.81 : x
  2. Step 2: Convert to fraction form
    12,695.63/17,515.91 = 8,222.81/x
  3. Step 3: Cross multiply
    12,695.63x = 17,515.91 × 8,222.81
  4. Step 4: Simplify right side
    12,695.63x = 144,029,932.88
  5. Step 5: Solve for x
    x = 144,029,932.88/12,695.63
  6. Step 6: Final answer
    x = 11,344.85

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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.