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Finding the Fourth Proportional to 25,085, 34,605 and 21,104.60

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Solution

The fourth proportional to 25,085, 34,605 and 21,104.60 is: 29,114.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,085 : 34,605 = 21,104.60 : x
  2. Step 2: Convert to fraction form
    25,085/34,605 = 21,104.60/x
  3. Step 3: Cross multiply
    25,085x = 34,605 × 21,104.60
  4. Step 4: Simplify right side
    25,085x = 730,324,683
  5. Step 5: Solve for x
    x = 730,324,683/25,085
  6. Step 6: Final answer
    x = 29,114.00

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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.