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Finding the Fourth Proportional to 18,835.60, 25,994.29 and 12,451.11

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Solution

The fourth proportional to 18,835.60, 25,994.29 and 12,451.11 is: 17,183.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835.60 : 25,994.29 = 12,451.11 : x
  2. Step 2: Convert to fraction form
    18,835.60/25,994.29 = 12,451.11/x
  3. Step 3: Cross multiply
    18,835.60x = 25,994.29 × 12,451.11
  4. Step 4: Simplify right side
    18,835.60x = 323,657,733.03
  5. Step 5: Solve for x
    x = 323,657,733.03/18,835.60
  6. Step 6: Final answer
    x = 17,183.30

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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.