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Finding the Fourth Proportional to 37.38, 51.59 and 21.00

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Solution

The fourth proportional to 37.38, 51.59 and 21.00 is: 28.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.38 : 51.59 = 21.00 : x
  2. Step 2: Convert to fraction form
    37.38/51.59 = 21.00/x
  3. Step 3: Cross multiply
    37.38x = 51.59 × 21.00
  4. Step 4: Simplify right side
    37.38x = 1,083.37
  5. Step 5: Solve for x
    x = 1,083.37/37.38
  6. Step 6: Final answer
    x = 28.99

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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.