Home / 12,622.40-18,921.60-4,722.80

Finding the Fourth Proportional to 12,622.40, 18,921.60 and 4,722.80

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Solution

The fourth proportional to 12,622.40, 18,921.60 and 4,722.80 is: 7,079.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,622.40 : 18,921.60 = 4,722.80 : x
  2. Step 2: Convert to fraction form
    12,622.40/18,921.60 = 4,722.80/x
  3. Step 3: Cross multiply
    12,622.40x = 18,921.60 × 4,722.80
  4. Step 4: Simplify right side
    12,622.40x = 89,362,932.48
  5. Step 5: Solve for x
    x = 89,362,932.48/12,622.40
  6. Step 6: Final answer
    x = 7,079.71

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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.