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Finding the Fourth Proportional to 13,745.89, 18,969.33 and 7,458.22

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Solution

The fourth proportional to 13,745.89, 18,969.33 and 7,458.22 is: 10,292.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.89 : 18,969.33 = 7,458.22 : x
  2. Step 2: Convert to fraction form
    13,745.89/18,969.33 = 7,458.22/x
  3. Step 3: Cross multiply
    13,745.89x = 18,969.33 × 7,458.22
  4. Step 4: Simplify right side
    13,745.89x = 141,477,436.39
  5. Step 5: Solve for x
    x = 141,477,436.39/13,745.89
  6. Step 6: Final answer
    x = 10,292.34

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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.