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Finding the Fourth Proportional to 18,628.03, 25,693.67 and 12,649.32

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Solution

The fourth proportional to 18,628.03, 25,693.67 and 12,649.32 is: 17,447.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.03 : 25,693.67 = 12,649.32 : x
  2. Step 2: Convert to fraction form
    18,628.03/25,693.67 = 12,649.32/x
  3. Step 3: Cross multiply
    18,628.03x = 25,693.67 × 12,649.32
  4. Step 4: Simplify right side
    18,628.03x = 325,007,453.80
  5. Step 5: Solve for x
    x = 325,007,453.80/18,628.03
  6. Step 6: Final answer
    x = 17,447.23

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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.