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Finding the Fourth Proportional to 25.71, 35.52 and 19.91

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Solution

The fourth proportional to 25.71, 35.52 and 19.91 is: 27.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.71 : 35.52 = 19.91 : x
  2. Step 2: Convert to fraction form
    25.71/35.52 = 19.91/x
  3. Step 3: Cross multiply
    25.71x = 35.52 × 19.91
  4. Step 4: Simplify right side
    25.71x = 706.98
  5. Step 5: Solve for x
    x = 706.98/25.71
  6. Step 6: Final answer
    x = 27.50

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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.