Home / 26,427.79-39,640.64-8,659.78

Finding the Fourth Proportional to 26,427.79, 39,640.64 and 8,659.78

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Solution

The fourth proportional to 26,427.79, 39,640.64 and 8,659.78 is: 12,989.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,427.79 : 39,640.64 = 8,659.78 : x
  2. Step 2: Convert to fraction form
    26,427.79/39,640.64 = 8,659.78/x
  3. Step 3: Cross multiply
    26,427.79x = 39,640.64 × 8,659.78
  4. Step 4: Simplify right side
    26,427.79x = 343,279,221.46
  5. Step 5: Solve for x
    x = 343,279,221.46/26,427.79
  6. Step 6: Final answer
    x = 12,989.33

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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.