Home / 20,605.50-30,900.90-8,912.34

Finding the Fourth Proportional to 20,605.50, 30,900.90 and 8,912.34

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Solution

The fourth proportional to 20,605.50, 30,900.90 and 8,912.34 is: 13,365.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.50 : 30,900.90 = 8,912.34 : x
  2. Step 2: Convert to fraction form
    20,605.50/30,900.90 = 8,912.34/x
  3. Step 3: Cross multiply
    20,605.50x = 30,900.90 × 8,912.34
  4. Step 4: Simplify right side
    20,605.50x = 275,399,327.11
  5. Step 5: Solve for x
    x = 275,399,327.11/20,605.50
  6. Step 6: Final answer
    x = 13,365.33

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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.