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Finding the Fourth Proportional to 17,811.20, 26,781.60 and 17,422.40

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Solution

The fourth proportional to 17,811.20, 26,781.60 and 17,422.40 is: 26,196.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,811.20 : 26,781.60 = 17,422.40 : x
  2. Step 2: Convert to fraction form
    17,811.20/26,781.60 = 17,422.40/x
  3. Step 3: Cross multiply
    17,811.20x = 26,781.60 × 17,422.40
  4. Step 4: Simplify right side
    17,811.20x = 466,599,747.84
  5. Step 5: Solve for x
    x = 466,599,747.84/17,811.20
  6. Step 6: Final answer
    x = 26,196.99

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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.