Home / 28,961.50-39,945-20,023.96

Finding the Fourth Proportional to 28,961.50, 39,945 and 20,023.96

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Solution

The fourth proportional to 28,961.50, 39,945 and 20,023.96 is: 27,617.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,961.50 : 39,945 = 20,023.96 : x
  2. Step 2: Convert to fraction form
    28,961.50/39,945 = 20,023.96/x
  3. Step 3: Cross multiply
    28,961.50x = 39,945 × 20,023.96
  4. Step 4: Simplify right side
    28,961.50x = 799,857,082.20
  5. Step 5: Solve for x
    x = 799,857,082.20/28,961.50
  6. Step 6: Final answer
    x = 27,617.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.