Home / 20,638.89-30,958.34-8,318.25

Finding the Fourth Proportional to 20,638.89, 30,958.34 and 8,318.25

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Solution

The fourth proportional to 20,638.89, 30,958.34 and 8,318.25 is: 12,477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.89 : 30,958.34 = 8,318.25 : x
  2. Step 2: Convert to fraction form
    20,638.89/30,958.34 = 8,318.25/x
  3. Step 3: Cross multiply
    20,638.89x = 30,958.34 × 8,318.25
  4. Step 4: Simplify right side
    20,638.89x = 257,519,170.11
  5. Step 5: Solve for x
    x = 257,519,170.11/20,638.89
  6. Step 6: Final answer
    x = 12,477.38

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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.