Home / 26,128.72-39,143.68-20,256.56

Finding the Fourth Proportional to 26,128.72, 39,143.68 and 20,256.56

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Solution

The fourth proportional to 26,128.72, 39,143.68 and 20,256.56 is: 30,346.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,128.72 : 39,143.68 = 20,256.56 : x
  2. Step 2: Convert to fraction form
    26,128.72/39,143.68 = 20,256.56/x
  3. Step 3: Cross multiply
    26,128.72x = 39,143.68 × 20,256.56
  4. Step 4: Simplify right side
    26,128.72x = 792,916,302.54
  5. Step 5: Solve for x
    x = 792,916,302.54/26,128.72
  6. Step 6: Final answer
    x = 30,346.54

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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.