Home / 19,921.68-29,892.60-8,078.22

Finding the Fourth Proportional to 19,921.68, 29,892.60 and 8,078.22

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Solution

The fourth proportional to 19,921.68, 29,892.60 and 8,078.22 is: 12,121.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.68 : 29,892.60 = 8,078.22 : x
  2. Step 2: Convert to fraction form
    19,921.68/29,892.60 = 8,078.22/x
  3. Step 3: Cross multiply
    19,921.68x = 29,892.60 × 8,078.22
  4. Step 4: Simplify right side
    19,921.68x = 241,478,999.17
  5. Step 5: Solve for x
    x = 241,478,999.17/19,921.68
  6. Step 6: Final answer
    x = 12,121.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.