Home / 5,139.19-7,708.72-1,243.56

Finding the Fourth Proportional to 5,139.19, 7,708.72 and 1,243.56

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Solution

The fourth proportional to 5,139.19, 7,708.72 and 1,243.56 is: 1,865.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.19 : 7,708.72 = 1,243.56 : x
  2. Step 2: Convert to fraction form
    5,139.19/7,708.72 = 1,243.56/x
  3. Step 3: Cross multiply
    5,139.19x = 7,708.72 × 1,243.56
  4. Step 4: Simplify right side
    5,139.19x = 9,586,255.84
  5. Step 5: Solve for x
    x = 9,586,255.84/5,139.19
  6. Step 6: Final answer
    x = 1,865.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.