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Finding the Fourth Proportional to 30.77, 42.46 and 16.95

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Solution

The fourth proportional to 30.77, 42.46 and 16.95 is: 23.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.77 : 42.46 = 16.95 : x
  2. Step 2: Convert to fraction form
    30.77/42.46 = 16.95/x
  3. Step 3: Cross multiply
    30.77x = 42.46 × 16.95
  4. Step 4: Simplify right side
    30.77x = 719.67
  5. Step 5: Solve for x
    x = 719.67/30.77
  6. Step 6: Final answer
    x = 23.39

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1.5x scale

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.