Home / 18,722.70-28,047.60-12,817.80

Finding the Fourth Proportional to 18,722.70, 28,047.60 and 12,817.80

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Solution

The fourth proportional to 18,722.70, 28,047.60 and 12,817.80 is: 19,201.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.70 : 28,047.60 = 12,817.80 : x
  2. Step 2: Convert to fraction form
    18,722.70/28,047.60 = 12,817.80/x
  3. Step 3: Cross multiply
    18,722.70x = 28,047.60 × 12,817.80
  4. Step 4: Simplify right side
    18,722.70x = 359,508,527.28
  5. Step 5: Solve for x
    x = 359,508,527.28/18,722.70
  6. Step 6: Final answer
    x = 19,201.75

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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.