Home / 12,869.44-17,760-7,280.56

Finding the Fourth Proportional to 12,869.44, 17,760 and 7,280.56

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Solution

The fourth proportional to 12,869.44, 17,760 and 7,280.56 is: 10,047.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,869.44 : 17,760 = 7,280.56 : x
  2. Step 2: Convert to fraction form
    12,869.44/17,760 = 7,280.56/x
  3. Step 3: Cross multiply
    12,869.44x = 17,760 × 7,280.56
  4. Step 4: Simplify right side
    12,869.44x = 129,302,745.60
  5. Step 5: Solve for x
    x = 129,302,745.60/12,869.44
  6. Step 6: Final answer
    x = 10,047.27

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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.