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Finding the Fourth Proportional to 30.36, 42 and 26.04

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Solution

The fourth proportional to 30.36, 42 and 26.04 is: 36.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.36 : 42 = 26.04 : x
  2. Step 2: Convert to fraction form
    30.36/42 = 26.04/x
  3. Step 3: Cross multiply
    30.36x = 42 × 26.04
  4. Step 4: Simplify right side
    30.36x = 1,093.68
  5. Step 5: Solve for x
    x = 1,093.68/30.36
  6. Step 6: Final answer
    x = 36.02

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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.