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Finding the Fourth Proportional to 18,561.88, 25,615.98 and 10,179.16

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Solution

The fourth proportional to 18,561.88, 25,615.98 and 10,179.16 is: 14,047.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.88 : 25,615.98 = 10,179.16 : x
  2. Step 2: Convert to fraction form
    18,561.88/25,615.98 = 10,179.16/x
  3. Step 3: Cross multiply
    18,561.88x = 25,615.98 × 10,179.16
  4. Step 4: Simplify right side
    18,561.88x = 260,749,158.98
  5. Step 5: Solve for x
    x = 260,749,158.98/18,561.88
  6. Step 6: Final answer
    x = 14,047.56

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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.