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Finding the Fourth Proportional to 18,597.20, 25,664.34 and 10,639.76

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Solution

The fourth proportional to 18,597.20, 25,664.34 and 10,639.76 is: 14,682.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,597.20 : 25,664.34 = 10,639.76 : x
  2. Step 2: Convert to fraction form
    18,597.20/25,664.34 = 10,639.76/x
  3. Step 3: Cross multiply
    18,597.20x = 25,664.34 × 10,639.76
  4. Step 4: Simplify right side
    18,597.20x = 273,062,418.16
  5. Step 5: Solve for x
    x = 273,062,418.16/18,597.20
  6. Step 6: Final answer
    x = 14,682.99

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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.