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Finding the Fourth Proportional to 13,745.70, 18,969.08 and 7,777.26

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Solution

The fourth proportional to 13,745.70, 18,969.08 and 7,777.26 is: 10,732.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.70 : 18,969.08 = 7,777.26 : x
  2. Step 2: Convert to fraction form
    13,745.70/18,969.08 = 7,777.26/x
  3. Step 3: Cross multiply
    13,745.70x = 18,969.08 × 7,777.26
  4. Step 4: Simplify right side
    13,745.70x = 147,527,428.23
  5. Step 5: Solve for x
    x = 147,527,428.23/13,745.70
  6. Step 6: Final answer
    x = 10,732.62

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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.