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Finding the Fourth Proportional to 26,815.20, 40,222.80 and 19,039.20

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Solution

The fourth proportional to 26,815.20, 40,222.80 and 19,039.20 is: 28,558.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,815.20 : 40,222.80 = 19,039.20 : x
  2. Step 2: Convert to fraction form
    26,815.20/40,222.80 = 19,039.20/x
  3. Step 3: Cross multiply
    26,815.20x = 40,222.80 × 19,039.20
  4. Step 4: Simplify right side
    26,815.20x = 765,809,933.76
  5. Step 5: Solve for x
    x = 765,809,933.76/26,815.20
  6. Step 6: Final answer
    x = 28,558.80

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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.