Home / 8,420.31-11,620.26-4,643.73

Finding the Fourth Proportional to 8,420.31, 11,620.26 and 4,643.73

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Solution

The fourth proportional to 8,420.31, 11,620.26 and 4,643.73 is: 6,408.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.31 : 11,620.26 = 4,643.73 : x
  2. Step 2: Convert to fraction form
    8,420.31/11,620.26 = 4,643.73/x
  3. Step 3: Cross multiply
    8,420.31x = 11,620.26 × 4,643.73
  4. Step 4: Simplify right side
    8,420.31x = 53,961,349.97
  5. Step 5: Solve for x
    x = 53,961,349.97/8,420.31
  6. Step 6: Final answer
    x = 6,408.48

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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.