Home / 26,720.66-40,090.20-11,939.78

Finding the Fourth Proportional to 26,720.66, 40,090.20 and 11,939.78

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Solution

The fourth proportional to 26,720.66, 40,090.20 and 11,939.78 is: 17,913.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,720.66 : 40,090.20 = 11,939.78 : x
  2. Step 2: Convert to fraction form
    26,720.66/40,090.20 = 11,939.78/x
  3. Step 3: Cross multiply
    26,720.66x = 40,090.20 × 11,939.78
  4. Step 4: Simplify right side
    26,720.66x = 478,668,168.16
  5. Step 5: Solve for x
    x = 478,668,168.16/26,720.66
  6. Step 6: Final answer
    x = 17,913.79

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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.