Home / 28,219.20-42,361.20-17,138.40

Finding the Fourth Proportional to 28,219.20, 42,361.20 and 17,138.40

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Solution

The fourth proportional to 28,219.20, 42,361.20 and 17,138.40 is: 25,727.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.20 : 42,361.20 = 17,138.40 : x
  2. Step 2: Convert to fraction form
    28,219.20/42,361.20 = 17,138.40/x
  3. Step 3: Cross multiply
    28,219.20x = 42,361.20 × 17,138.40
  4. Step 4: Simplify right side
    28,219.20x = 726,003,190.08
  5. Step 5: Solve for x
    x = 726,003,190.08/28,219.20
  6. Step 6: Final answer
    x = 25,727.28

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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.