Home / 18,816.20-28,219.80-10,901.60

Finding the Fourth Proportional to 18,816.20, 28,219.80 and 10,901.60

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Solution

The fourth proportional to 18,816.20, 28,219.80 and 10,901.60 is: 16,349.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.20 : 28,219.80 = 10,901.60 : x
  2. Step 2: Convert to fraction form
    18,816.20/28,219.80 = 10,901.60/x
  3. Step 3: Cross multiply
    18,816.20x = 28,219.80 × 10,901.60
  4. Step 4: Simplify right side
    18,816.20x = 307,640,971.68
  5. Step 5: Solve for x
    x = 307,640,971.68/18,816.20
  6. Step 6: Final answer
    x = 16,349.79

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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.