Home / 5,138.58-7,708.39-1,440.82

Finding the Fourth Proportional to 5,138.58, 7,708.39 and 1,440.82

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Solution

The fourth proportional to 5,138.58, 7,708.39 and 1,440.82 is: 2,161.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.58 : 7,708.39 = 1,440.82 : x
  2. Step 2: Convert to fraction form
    5,138.58/7,708.39 = 1,440.82/x
  3. Step 3: Cross multiply
    5,138.58x = 7,708.39 × 1,440.82
  4. Step 4: Simplify right side
    5,138.58x = 11,106,402.48
  5. Step 5: Solve for x
    x = 11,106,402.48/5,138.58
  6. Step 6: Final answer
    x = 2,161.38

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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.