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Finding the Fourth Proportional to 30,993.70, 42,771.61 and 16,846.54

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Solution

The fourth proportional to 30,993.70, 42,771.61 and 16,846.54 is: 23,248.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,993.70 : 42,771.61 = 16,846.54 : x
  2. Step 2: Convert to fraction form
    30,993.70/42,771.61 = 16,846.54/x
  3. Step 3: Cross multiply
    30,993.70x = 42,771.61 × 16,846.54
  4. Step 4: Simplify right side
    30,993.70x = 720,553,424.87
  5. Step 5: Solve for x
    x = 720,553,424.87/30,993.70
  6. Step 6: Final answer
    x = 23,248.38

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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.