Home / 18,255.78-27,380.40-5,109.48

Finding the Fourth Proportional to 18,255.78, 27,380.40 and 5,109.48

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Solution

The fourth proportional to 18,255.78, 27,380.40 and 5,109.48 is: 7,663.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,255.78 : 27,380.40 = 5,109.48 : x
  2. Step 2: Convert to fraction form
    18,255.78/27,380.40 = 5,109.48/x
  3. Step 3: Cross multiply
    18,255.78x = 27,380.40 × 5,109.48
  4. Step 4: Simplify right side
    18,255.78x = 139,899,606.19
  5. Step 5: Solve for x
    x = 139,899,606.19/18,255.78
  6. Step 6: Final answer
    x = 7,663.30

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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.