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Finding the Fourth Proportional to 19, 28.36 and 18.46

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Solution

The fourth proportional to 19, 28.36 and 18.46 is: 27.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19 : 28.36 = 18.46 : x
  2. Step 2: Convert to fraction form
    19/28.36 = 18.46/x
  3. Step 3: Cross multiply
    19x = 28.36 × 18.46
  4. Step 4: Simplify right side
    19x = 523.53
  5. Step 5: Solve for x
    x = 523.53/19
  6. Step 6: Final answer
    x = 27.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.