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Finding the Fourth Proportional to 27.51, 38.01 and 20.53

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Solution

The fourth proportional to 27.51, 38.01 and 20.53 is: 28.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.51 : 38.01 = 20.53 : x
  2. Step 2: Convert to fraction form
    27.51/38.01 = 20.53/x
  3. Step 3: Cross multiply
    27.51x = 38.01 × 20.53
  4. Step 4: Simplify right side
    27.51x = 780.17
  5. Step 5: Solve for x
    x = 780.17/27.51
  6. Step 6: Final answer
    x = 28.36

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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.