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Finding the Fourth Proportional to 19,399.69, 26,781.69 and 13,059.64

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Solution

The fourth proportional to 19,399.69, 26,781.69 and 13,059.64 is: 18,029.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,399.69 : 26,781.69 = 13,059.64 : x
  2. Step 2: Convert to fraction form
    19,399.69/26,781.69 = 13,059.64/x
  3. Step 3: Cross multiply
    19,399.69x = 26,781.69 × 13,059.64
  4. Step 4: Simplify right side
    19,399.69x = 349,759,229.99
  5. Step 5: Solve for x
    x = 349,759,229.99/19,399.69
  6. Step 6: Final answer
    x = 18,029.11

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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.