Home / 12,855.12-19,283.32-6,286.80

Finding the Fourth Proportional to 12,855.12, 19,283.32 and 6,286.80

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Solution

The fourth proportional to 12,855.12, 19,283.32 and 6,286.80 is: 9,430.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.12 : 19,283.32 = 6,286.80 : x
  2. Step 2: Convert to fraction form
    12,855.12/19,283.32 = 6,286.80/x
  3. Step 3: Cross multiply
    12,855.12x = 19,283.32 × 6,286.80
  4. Step 4: Simplify right side
    12,855.12x = 121,230,376.18
  5. Step 5: Solve for x
    x = 121,230,376.18/12,855.12
  6. Step 6: Final answer
    x = 9,430.51

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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.