Home / 21,512.25-29,613.20-18,662.87

Finding the Fourth Proportional to 21,512.25, 29,613.20 and 18,662.87

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Solution

The fourth proportional to 21,512.25, 29,613.20 and 18,662.87 is: 25,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.25 : 29,613.20 = 18,662.87 : x
  2. Step 2: Convert to fraction form
    21,512.25/29,613.20 = 18,662.87/x
  3. Step 3: Cross multiply
    21,512.25x = 29,613.20 × 18,662.87
  4. Step 4: Simplify right side
    21,512.25x = 552,667,282.60
  5. Step 5: Solve for x
    x = 552,667,282.60/21,512.25
  6. Step 6: Final answer
    x = 25,690.82

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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.