Home / 18,998.70-28,498.05-12,777.90

Finding the Fourth Proportional to 18,998.70, 28,498.05 and 12,777.90

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Solution

The fourth proportional to 18,998.70, 28,498.05 and 12,777.90 is: 19,166.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.70 : 28,498.05 = 12,777.90 : x
  2. Step 2: Convert to fraction form
    18,998.70/28,498.05 = 12,777.90/x
  3. Step 3: Cross multiply
    18,998.70x = 28,498.05 × 12,777.90
  4. Step 4: Simplify right side
    18,998.70x = 364,145,233.10
  5. Step 5: Solve for x
    x = 364,145,233.10/18,998.70
  6. Step 6: Final answer
    x = 19,166.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.