Home / 12,012.40-18,021.30-3,692.80

Finding the Fourth Proportional to 12,012.40, 18,021.30 and 3,692.80

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Solution

The fourth proportional to 12,012.40, 18,021.30 and 3,692.80 is: 5,540.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,012.40 : 18,021.30 = 3,692.80 : x
  2. Step 2: Convert to fraction form
    12,012.40/18,021.30 = 3,692.80/x
  3. Step 3: Cross multiply
    12,012.40x = 18,021.30 × 3,692.80
  4. Step 4: Simplify right side
    12,012.40x = 66,549,056.64
  5. Step 5: Solve for x
    x = 66,549,056.64/12,012.40
  6. Step 6: Final answer
    x = 5,540.03

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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.