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Finding the Fourth Proportional to 20,220, 27,906.48 and 19,334.40

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Solution

The fourth proportional to 20,220, 27,906.48 and 19,334.40 is: 26,684.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220 : 27,906.48 = 19,334.40 : x
  2. Step 2: Convert to fraction form
    20,220/27,906.48 = 19,334.40/x
  3. Step 3: Cross multiply
    20,220x = 27,906.48 × 19,334.40
  4. Step 4: Simplify right side
    20,220x = 539,555,046.91
  5. Step 5: Solve for x
    x = 539,555,046.91/20,220
  6. Step 6: Final answer
    x = 26,684.23

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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.