Home / 26,138.60-39,142.20-20,299.28

Finding the Fourth Proportional to 26,138.60, 39,142.20 and 20,299.28

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Solution

The fourth proportional to 26,138.60, 39,142.20 and 20,299.28 is: 30,397.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,138.60 : 39,142.20 = 20,299.28 : x
  2. Step 2: Convert to fraction form
    26,138.60/39,142.20 = 20,299.28/x
  3. Step 3: Cross multiply
    26,138.60x = 39,142.20 × 20,299.28
  4. Step 4: Simplify right side
    26,138.60x = 794,558,477.62
  5. Step 5: Solve for x
    x = 794,558,477.62/26,138.60
  6. Step 6: Final answer
    x = 30,397.90

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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.