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Finding the Fourth Proportional to 38.44, 53.05 and 21.19

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Solution

The fourth proportional to 38.44, 53.05 and 21.19 is: 29.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.44 : 53.05 = 21.19 : x
  2. Step 2: Convert to fraction form
    38.44/53.05 = 21.19/x
  3. Step 3: Cross multiply
    38.44x = 53.05 × 21.19
  4. Step 4: Simplify right side
    38.44x = 1,123.94
  5. Step 5: Solve for x
    x = 1,123.94/38.44
  6. Step 6: Final answer
    x = 29.24

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.