Home / 18,747.50-28,129.01-8,212.05

Finding the Fourth Proportional to 18,747.50, 28,129.01 and 8,212.05

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Solution

The fourth proportional to 18,747.50, 28,129.01 and 8,212.05 is: 12,321.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.50 : 28,129.01 = 8,212.05 : x
  2. Step 2: Convert to fraction form
    18,747.50/28,129.01 = 8,212.05/x
  3. Step 3: Cross multiply
    18,747.50x = 28,129.01 × 8,212.05
  4. Step 4: Simplify right side
    18,747.50x = 230,996,795.51
  5. Step 5: Solve for x
    x = 230,996,795.51/18,747.50
  6. Step 6: Final answer
    x = 12,321.48

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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.