Home / 5,138.13-7,707.20-1,242.54

Finding the Fourth Proportional to 5,138.13, 7,707.20 and 1,242.54

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Solution

The fourth proportional to 5,138.13, 7,707.20 and 1,242.54 is: 1,863.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.13 : 7,707.20 = 1,242.54 : x
  2. Step 2: Convert to fraction form
    5,138.13/7,707.20 = 1,242.54/x
  3. Step 3: Cross multiply
    5,138.13x = 7,707.20 × 1,242.54
  4. Step 4: Simplify right side
    5,138.13x = 9,576,504.29
  5. Step 5: Solve for x
    x = 9,576,504.29/5,138.13
  6. Step 6: Final answer
    x = 1,863.81

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1.5x scale

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.