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Finding the Fourth Proportional to 28,550.40, 42,825.60 and 19,219.20

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Solution

The fourth proportional to 28,550.40, 42,825.60 and 19,219.20 is: 28,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,550.40 : 42,825.60 = 19,219.20 : x
  2. Step 2: Convert to fraction form
    28,550.40/42,825.60 = 19,219.20/x
  3. Step 3: Cross multiply
    28,550.40x = 42,825.60 × 19,219.20
  4. Step 4: Simplify right side
    28,550.40x = 823,073,771.52
  5. Step 5: Solve for x
    x = 823,073,771.52/28,550.40
  6. Step 6: Final answer
    x = 28,828.80

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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.