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Finding the Fourth Proportional to 25,391.40, 35,040.15 and 13,906.25

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Solution

The fourth proportional to 25,391.40, 35,040.15 and 13,906.25 is: 19,190.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,391.40 : 35,040.15 = 13,906.25 : x
  2. Step 2: Convert to fraction form
    25,391.40/35,040.15 = 13,906.25/x
  3. Step 3: Cross multiply
    25,391.40x = 35,040.15 × 13,906.25
  4. Step 4: Simplify right side
    25,391.40x = 487,277,085.94
  5. Step 5: Solve for x
    x = 487,277,085.94/25,391.40
  6. Step 6: Final answer
    x = 19,190.63

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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.