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Finding the Fourth Proportional to 47.36, 70.95 and 38.85

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Solution

The fourth proportional to 47.36, 70.95 and 38.85 is: 58.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.36 : 70.95 = 38.85 : x
  2. Step 2: Convert to fraction form
    47.36/70.95 = 38.85/x
  3. Step 3: Cross multiply
    47.36x = 70.95 × 38.85
  4. Step 4: Simplify right side
    47.36x = 2,756.78
  5. Step 5: Solve for x
    x = 2,756.78/47.36
  6. Step 6: Final answer
    x = 58.21

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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.