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Finding the Fourth Proportional to 27.60, 37.90 and 22.10

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Solution

The fourth proportional to 27.60, 37.90 and 22.10 is: 30.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.60 : 37.90 = 22.10 : x
  2. Step 2: Convert to fraction form
    27.60/37.90 = 22.10/x
  3. Step 3: Cross multiply
    27.60x = 37.90 × 22.10
  4. Step 4: Simplify right side
    27.60x = 837.59
  5. Step 5: Solve for x
    x = 837.59/27.60
  6. Step 6: Final answer
    x = 30.35

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.