Home / 31,673.47-43,690.35-20,918.44

Finding the Fourth Proportional to 31,673.47, 43,690.35 and 20,918.44

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Solution

The fourth proportional to 31,673.47, 43,690.35 and 20,918.44 is: 28,854.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,673.47 : 43,690.35 = 20,918.44 : x
  2. Step 2: Convert to fraction form
    31,673.47/43,690.35 = 20,918.44/x
  3. Step 3: Cross multiply
    31,673.47x = 43,690.35 × 20,918.44
  4. Step 4: Simplify right side
    31,673.47x = 913,933,965.05
  5. Step 5: Solve for x
    x = 913,933,965.05/31,673.47
  6. Step 6: Final answer
    x = 28,854.87

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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.