Home / 31,427.88-43,363.38-18,690.42

Finding the Fourth Proportional to 31,427.88, 43,363.38 and 18,690.42

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Solution

The fourth proportional to 31,427.88, 43,363.38 and 18,690.42 is: 25,788.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,427.88 : 43,363.38 = 18,690.42 : x
  2. Step 2: Convert to fraction form
    31,427.88/43,363.38 = 18,690.42/x
  3. Step 3: Cross multiply
    31,427.88x = 43,363.38 × 18,690.42
  4. Step 4: Simplify right side
    31,427.88x = 810,479,784.82
  5. Step 5: Solve for x
    x = 810,479,784.82/31,427.88
  6. Step 6: Final answer
    x = 25,788.56

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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.