Home / 31,135.62-42,940.46-20,514.09

Finding the Fourth Proportional to 31,135.62, 42,940.46 and 20,514.09

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Solution

The fourth proportional to 31,135.62, 42,940.46 and 20,514.09 is: 28,291.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.62 : 42,940.46 = 20,514.09 : x
  2. Step 2: Convert to fraction form
    31,135.62/42,940.46 = 20,514.09/x
  3. Step 3: Cross multiply
    31,135.62x = 42,940.46 × 20,514.09
  4. Step 4: Simplify right side
    31,135.62x = 880,884,673.39
  5. Step 5: Solve for x
    x = 880,884,673.39/31,135.62
  6. Step 6: Final answer
    x = 28,291.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.