Home / 20,219.12-30,327.60-5,427.80

Finding the Fourth Proportional to 20,219.12, 30,327.60 and 5,427.80

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Solution

The fourth proportional to 20,219.12, 30,327.60 and 5,427.80 is: 8,141.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.12 : 30,327.60 = 5,427.80 : x
  2. Step 2: Convert to fraction form
    20,219.12/30,327.60 = 5,427.80/x
  3. Step 3: Cross multiply
    20,219.12x = 30,327.60 × 5,427.80
  4. Step 4: Simplify right side
    20,219.12x = 164,612,147.28
  5. Step 5: Solve for x
    x = 164,612,147.28/20,219.12
  6. Step 6: Final answer
    x = 8,141.41

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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.