Home / 12,180.40-18,273.60-3,415.20

Finding the Fourth Proportional to 12,180.40, 18,273.60 and 3,415.20

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Solution

The fourth proportional to 12,180.40, 18,273.60 and 3,415.20 is: 5,123.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.40 : 18,273.60 = 3,415.20 : x
  2. Step 2: Convert to fraction form
    12,180.40/18,273.60 = 3,415.20/x
  3. Step 3: Cross multiply
    12,180.40x = 18,273.60 × 3,415.20
  4. Step 4: Simplify right side
    12,180.40x = 62,407,998.72
  5. Step 5: Solve for x
    x = 62,407,998.72/12,180.40
  6. Step 6: Final answer
    x = 5,123.64

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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.