Home / 12,219.68-18,330.20-3,454.36

Finding the Fourth Proportional to 12,219.68, 18,330.20 and 3,454.36

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Solution

The fourth proportional to 12,219.68, 18,330.20 and 3,454.36 is: 5,181.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.68 : 18,330.20 = 3,454.36 : x
  2. Step 2: Convert to fraction form
    12,219.68/18,330.20 = 3,454.36/x
  3. Step 3: Cross multiply
    12,219.68x = 18,330.20 × 3,454.36
  4. Step 4: Simplify right side
    12,219.68x = 63,319,109.67
  5. Step 5: Solve for x
    x = 63,319,109.67/12,219.68
  6. Step 6: Final answer
    x = 5,181.73

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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.