Home / 12,005.40-18,010.80-3,685.80

Finding the Fourth Proportional to 12,005.40, 18,010.80 and 3,685.80

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Solution

The fourth proportional to 12,005.40, 18,010.80 and 3,685.80 is: 5,529.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.40 : 18,010.80 = 3,685.80 : x
  2. Step 2: Convert to fraction form
    12,005.40/18,010.80 = 3,685.80/x
  3. Step 3: Cross multiply
    12,005.40x = 18,010.80 × 3,685.80
  4. Step 4: Simplify right side
    12,005.40x = 66,384,206.64
  5. Step 5: Solve for x
    x = 66,384,206.64/12,005.40
  6. Step 6: Final answer
    x = 5,529.53

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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.