Home / 20,939.25-31,548.56-18,940.23

Finding the Fourth Proportional to 20,939.25, 31,548.56 and 18,940.23

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Solution

The fourth proportional to 20,939.25, 31,548.56 and 18,940.23 is: 28,536.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.25 : 31,548.56 = 18,940.23 : x
  2. Step 2: Convert to fraction form
    20,939.25/31,548.56 = 18,940.23/x
  3. Step 3: Cross multiply
    20,939.25x = 31,548.56 × 18,940.23
  4. Step 4: Simplify right side
    20,939.25x = 597,536,887.87
  5. Step 5: Solve for x
    x = 597,536,887.87/20,939.25
  6. Step 6: Final answer
    x = 28,536.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.