Home / 13,650.78-20,481.01-7,812.30

Finding the Fourth Proportional to 13,650.78, 20,481.01 and 7,812.30

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Solution

The fourth proportional to 13,650.78, 20,481.01 and 7,812.30 is: 11,721.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,650.78 : 20,481.01 = 7,812.30 : x
  2. Step 2: Convert to fraction form
    13,650.78/20,481.01 = 7,812.30/x
  3. Step 3: Cross multiply
    13,650.78x = 20,481.01 × 7,812.30
  4. Step 4: Simplify right side
    13,650.78x = 160,003,794.42
  5. Step 5: Solve for x
    x = 160,003,794.42/13,650.78
  6. Step 6: Final answer
    x = 11,721.22

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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.