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Finding the Fourth Proportional to 53.19, 79.76 and 18.95

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Solution

The fourth proportional to 53.19, 79.76 and 18.95 is: 28.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.19 : 79.76 = 18.95 : x
  2. Step 2: Convert to fraction form
    53.19/79.76 = 18.95/x
  3. Step 3: Cross multiply
    53.19x = 79.76 × 18.95
  4. Step 4: Simplify right side
    53.19x = 1,511.24
  5. Step 5: Solve for x
    x = 1,511.24/53.19
  6. Step 6: Final answer
    x = 28.41

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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.