Home / 12,219.96-18,314.76-4,420.20

Finding the Fourth Proportional to 12,219.96, 18,314.76 and 4,420.20

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Solution

The fourth proportional to 12,219.96, 18,314.76 and 4,420.20 is: 6,624.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.96 : 18,314.76 = 4,420.20 : x
  2. Step 2: Convert to fraction form
    12,219.96/18,314.76 = 4,420.20/x
  3. Step 3: Cross multiply
    12,219.96x = 18,314.76 × 4,420.20
  4. Step 4: Simplify right side
    12,219.96x = 80,954,902.15
  5. Step 5: Solve for x
    x = 80,954,902.15/12,219.96
  6. Step 6: Final answer
    x = 6,624.81

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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.