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Finding the Fourth Proportional to 12,469.71, 17,210.34 and 11,909.19

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Solution

The fourth proportional to 12,469.71, 17,210.34 and 11,909.19 is: 16,436.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,469.71 : 17,210.34 = 11,909.19 : x
  2. Step 2: Convert to fraction form
    12,469.71/17,210.34 = 11,909.19/x
  3. Step 3: Cross multiply
    12,469.71x = 17,210.34 × 11,909.19
  4. Step 4: Simplify right side
    12,469.71x = 204,961,209.02
  5. Step 5: Solve for x
    x = 204,961,209.02/12,469.71
  6. Step 6: Final answer
    x = 16,436.73

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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.