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Finding the Fourth Proportional to 12,491.64, 17,209.19 and 8,707.93

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Solution

The fourth proportional to 12,491.64, 17,209.19 and 8,707.93 is: 11,996.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.64 : 17,209.19 = 8,707.93 : x
  2. Step 2: Convert to fraction form
    12,491.64/17,209.19 = 8,707.93/x
  3. Step 3: Cross multiply
    12,491.64x = 17,209.19 × 8,707.93
  4. Step 4: Simplify right side
    12,491.64x = 149,856,400.62
  5. Step 5: Solve for x
    x = 149,856,400.62/12,491.64
  6. Step 6: Final answer
    x = 11,996.54

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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.