Home / 12,821.94-17,695.80-7,786.98

Finding the Fourth Proportional to 12,821.94, 17,695.80 and 7,786.98

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Solution

The fourth proportional to 12,821.94, 17,695.80 and 7,786.98 is: 10,746.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.94 : 17,695.80 = 7,786.98 : x
  2. Step 2: Convert to fraction form
    12,821.94/17,695.80 = 7,786.98/x
  3. Step 3: Cross multiply
    12,821.94x = 17,695.80 × 7,786.98
  4. Step 4: Simplify right side
    12,821.94x = 137,796,840.68
  5. Step 5: Solve for x
    x = 137,796,840.68/12,821.94
  6. Step 6: Final answer
    x = 10,746.96

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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.