Home / 31,086.20-42,914.76-21,067.52

Finding the Fourth Proportional to 31,086.20, 42,914.76 and 21,067.52

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Solution

The fourth proportional to 31,086.20, 42,914.76 and 21,067.52 is: 29,083.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,086.20 : 42,914.76 = 21,067.52 : x
  2. Step 2: Convert to fraction form
    31,086.20/42,914.76 = 21,067.52/x
  3. Step 3: Cross multiply
    31,086.20x = 42,914.76 × 21,067.52
  4. Step 4: Simplify right side
    31,086.20x = 904,107,564.60
  5. Step 5: Solve for x
    x = 904,107,564.60/31,086.20
  6. Step 6: Final answer
    x = 29,083.89

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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.