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Finding the Fourth Proportional to 18,679.89, 25,778.25 and 10,296.39

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Solution

The fourth proportional to 18,679.89, 25,778.25 and 10,296.39 is: 14,209.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.89 : 25,778.25 = 10,296.39 : x
  2. Step 2: Convert to fraction form
    18,679.89/25,778.25 = 10,296.39/x
  3. Step 3: Cross multiply
    18,679.89x = 25,778.25 × 10,296.39
  4. Step 4: Simplify right side
    18,679.89x = 265,422,915.52
  5. Step 5: Solve for x
    x = 265,422,915.52/18,679.89
  6. Step 6: Final answer
    x = 14,209.02

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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.