Home / 3,927.86-5,420.56-2,135.46

Finding the Fourth Proportional to 3,927.86, 5,420.56 and 2,135.46

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Solution

The fourth proportional to 3,927.86, 5,420.56 and 2,135.46 is: 2,947.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.86 : 5,420.56 = 2,135.46 : x
  2. Step 2: Convert to fraction form
    3,927.86/5,420.56 = 2,135.46/x
  3. Step 3: Cross multiply
    3,927.86x = 5,420.56 × 2,135.46
  4. Step 4: Simplify right side
    3,927.86x = 11,575,408.05
  5. Step 5: Solve for x
    x = 11,575,408.05/3,927.86
  6. Step 6: Final answer
    x = 2,947.00

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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.