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Finding the Fourth Proportional to 30.25, 45.38 and 13.13

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Solution

The fourth proportional to 30.25, 45.38 and 13.13 is: 19.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.25 : 45.38 = 13.13 : x
  2. Step 2: Convert to fraction form
    30.25/45.38 = 13.13/x
  3. Step 3: Cross multiply
    30.25x = 45.38 × 13.13
  4. Step 4: Simplify right side
    30.25x = 595.84
  5. Step 5: Solve for x
    x = 595.84/30.25
  6. Step 6: Final answer
    x = 19.70

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.