Home / 21,971.10-33,129-20,134.02

Finding the Fourth Proportional to 21,971.10, 33,129 and 20,134.02

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Solution

The fourth proportional to 21,971.10, 33,129 and 20,134.02 is: 30,358.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.10 : 33,129 = 20,134.02 : x
  2. Step 2: Convert to fraction form
    21,971.10/33,129 = 20,134.02/x
  3. Step 3: Cross multiply
    21,971.10x = 33,129 × 20,134.02
  4. Step 4: Simplify right side
    21,971.10x = 667,019,948.58
  5. Step 5: Solve for x
    x = 667,019,948.58/21,971.10
  6. Step 6: Final answer
    x = 30,358.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.