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Finding the Fourth Proportional to 15,003.76, 20,703.99 and 8,716.54

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Solution

The fourth proportional to 15,003.76, 20,703.99 and 8,716.54 is: 12,028.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.76 : 20,703.99 = 8,716.54 : x
  2. Step 2: Convert to fraction form
    15,003.76/20,703.99 = 8,716.54/x
  3. Step 3: Cross multiply
    15,003.76x = 20,703.99 × 8,716.54
  4. Step 4: Simplify right side
    15,003.76x = 180,467,156.99
  5. Step 5: Solve for x
    x = 180,467,156.99/15,003.76
  6. Step 6: Final answer
    x = 12,028.13

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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.