Home / 3,931.88-5,427.36-2,756.39

Finding the Fourth Proportional to 3,931.88, 5,427.36 and 2,756.39

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Solution

The fourth proportional to 3,931.88, 5,427.36 and 2,756.39 is: 3,804.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.88 : 5,427.36 = 2,756.39 : x
  2. Step 2: Convert to fraction form
    3,931.88/5,427.36 = 2,756.39/x
  3. Step 3: Cross multiply
    3,931.88x = 5,427.36 × 2,756.39
  4. Step 4: Simplify right side
    3,931.88x = 14,959,893.69
  5. Step 5: Solve for x
    x = 14,959,893.69/3,931.88
  6. Step 6: Final answer
    x = 3,804.77

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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.