Home / 12,858.30-19,288.88-4,091.18

Finding the Fourth Proportional to 12,858.30, 19,288.88 and 4,091.18

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Solution

The fourth proportional to 12,858.30, 19,288.88 and 4,091.18 is: 6,137.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.30 : 19,288.88 = 4,091.18 : x
  2. Step 2: Convert to fraction form
    12,858.30/19,288.88 = 4,091.18/x
  3. Step 3: Cross multiply
    12,858.30x = 19,288.88 × 4,091.18
  4. Step 4: Simplify right side
    12,858.30x = 78,914,163.18
  5. Step 5: Solve for x
    x = 78,914,163.18/12,858.30
  6. Step 6: Final answer
    x = 6,137.22

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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.