Home / 21,022.78-29,015.64-12,076.42

Finding the Fourth Proportional to 21,022.78, 29,015.64 and 12,076.42

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Solution

The fourth proportional to 21,022.78, 29,015.64 and 12,076.42 is: 16,667.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.78 : 29,015.64 = 12,076.42 : x
  2. Step 2: Convert to fraction form
    21,022.78/29,015.64 = 12,076.42/x
  3. Step 3: Cross multiply
    21,022.78x = 29,015.64 × 12,076.42
  4. Step 4: Simplify right side
    21,022.78x = 350,405,055.21
  5. Step 5: Solve for x
    x = 350,405,055.21/21,022.78
  6. Step 6: Final answer
    x = 16,667.87

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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.