Home / 8,220.56-12,331.40-3,539.43

Finding the Fourth Proportional to 8,220.56, 12,331.40 and 3,539.43

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Solution

The fourth proportional to 8,220.56, 12,331.40 and 3,539.43 is: 5,309.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.56 : 12,331.40 = 3,539.43 : x
  2. Step 2: Convert to fraction form
    8,220.56/12,331.40 = 3,539.43/x
  3. Step 3: Cross multiply
    8,220.56x = 12,331.40 × 3,539.43
  4. Step 4: Simplify right side
    8,220.56x = 43,646,109.40
  5. Step 5: Solve for x
    x = 43,646,109.40/8,220.56
  6. Step 6: Final answer
    x = 5,309.39

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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.