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Finding the Fourth Proportional to 39.83, 59.72 and 12.77

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Solution

The fourth proportional to 39.83, 59.72 and 12.77 is: 19.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.83 : 59.72 = 12.77 : x
  2. Step 2: Convert to fraction form
    39.83/59.72 = 12.77/x
  3. Step 3: Cross multiply
    39.83x = 59.72 × 12.77
  4. Step 4: Simplify right side
    39.83x = 762.49
  5. Step 5: Solve for x
    x = 762.49/39.83
  6. Step 6: Final answer
    x = 19.15

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