Home / 12,245.40-18,343.80-6,690.60

Finding the Fourth Proportional to 12,245.40, 18,343.80 and 6,690.60

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Solution

The fourth proportional to 12,245.40, 18,343.80 and 6,690.60 is: 10,022.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,245.40 : 18,343.80 = 6,690.60 : x
  2. Step 2: Convert to fraction form
    12,245.40/18,343.80 = 6,690.60/x
  3. Step 3: Cross multiply
    12,245.40x = 18,343.80 × 6,690.60
  4. Step 4: Simplify right side
    12,245.40x = 122,731,028.28
  5. Step 5: Solve for x
    x = 122,731,028.28/12,245.40
  6. Step 6: Final answer
    x = 10,022.62

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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.