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Finding the Fourth Proportional to 43, 64.51 and 15.95

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Solution

The fourth proportional to 43, 64.51 and 15.95 is: 23.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    43 : 64.51 = 15.95 : x
  2. Step 2: Convert to fraction form
    43/64.51 = 15.95/x
  3. Step 3: Cross multiply
    43x = 64.51 × 15.95
  4. Step 4: Simplify right side
    43x = 1,028.93
  5. Step 5: Solve for x
    x = 1,028.93/43
  6. Step 6: Final answer
    x = 23.93

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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.