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Finding the Fourth Proportional to 12,557.80, 18,815.10 and 5,969.80

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Solution

The fourth proportional to 12,557.80, 18,815.10 and 5,969.80 is: 8,944.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,557.80 : 18,815.10 = 5,969.80 : x
  2. Step 2: Convert to fraction form
    12,557.80/18,815.10 = 5,969.80/x
  3. Step 3: Cross multiply
    12,557.80x = 18,815.10 × 5,969.80
  4. Step 4: Simplify right side
    12,557.80x = 112,322,383.98
  5. Step 5: Solve for x
    x = 112,322,383.98/12,557.80
  6. Step 6: Final answer
    x = 8,944.43

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1.5x scale

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.