Home / 20,123.10-30,163.05-7,638.30

Finding the Fourth Proportional to 20,123.10, 30,163.05 and 7,638.30

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Solution

The fourth proportional to 20,123.10, 30,163.05 and 7,638.30 is: 11,449.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.10 : 30,163.05 = 7,638.30 : x
  2. Step 2: Convert to fraction form
    20,123.10/30,163.05 = 7,638.30/x
  3. Step 3: Cross multiply
    20,123.10x = 30,163.05 × 7,638.30
  4. Step 4: Simplify right side
    20,123.10x = 230,394,424.82
  5. Step 5: Solve for x
    x = 230,394,424.82/20,123.10
  6. Step 6: Final answer
    x = 11,449.25

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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.