Home / 27.24-40.72-21.16

Finding the Fourth Proportional to 27.24, 40.72 and 21.16

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Solution

The fourth proportional to 27.24, 40.72 and 21.16 is: 31.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.24 : 40.72 = 21.16 : x
  2. Step 2: Convert to fraction form
    27.24/40.72 = 21.16/x
  3. Step 3: Cross multiply
    27.24x = 40.72 × 21.16
  4. Step 4: Simplify right side
    27.24x = 861.64
  5. Step 5: Solve for x
    x = 861.64/27.24
  6. Step 6: Final answer
    x = 31.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.