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Finding the Fourth Proportional to 14.15, 21.22 and 4.00

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Solution

The fourth proportional to 14.15, 21.22 and 4.00 is: 6.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.15 : 21.22 = 4.00 : x
  2. Step 2: Convert to fraction form
    14.15/21.22 = 4.00/x
  3. Step 3: Cross multiply
    14.15x = 21.22 × 4.00
  4. Step 4: Simplify right side
    14.15x = 84.99
  5. Step 5: Solve for x
    x = 84.99/14.15
  6. Step 6: Final answer
    x = 6.01

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Why These Related Problems?

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