Home / 5,138.27-7,090.85-2,838.72

Finding the Fourth Proportional to 5,138.27, 7,090.85 and 2,838.72

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Solution

The fourth proportional to 5,138.27, 7,090.85 and 2,838.72 is: 3,917.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.27 : 7,090.85 = 2,838.72 : x
  2. Step 2: Convert to fraction form
    5,138.27/7,090.85 = 2,838.72/x
  3. Step 3: Cross multiply
    5,138.27x = 7,090.85 × 2,838.72
  4. Step 4: Simplify right side
    5,138.27x = 20,128,923.52
  5. Step 5: Solve for x
    x = 20,128,923.52/5,138.27
  6. Step 6: Final answer
    x = 3,917.46

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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.