Home / 12,185.12-18,269.80-4,790.36

Finding the Fourth Proportional to 12,185.12, 18,269.80 and 4,790.36

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Solution

The fourth proportional to 12,185.12, 18,269.80 and 4,790.36 is: 7,182.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.12 : 18,269.80 = 4,790.36 : x
  2. Step 2: Convert to fraction form
    12,185.12/18,269.80 = 4,790.36/x
  3. Step 3: Cross multiply
    12,185.12x = 18,269.80 × 4,790.36
  4. Step 4: Simplify right side
    12,185.12x = 87,518,919.13
  5. Step 5: Solve for x
    x = 87,518,919.13/12,185.12
  6. Step 6: Final answer
    x = 7,182.44

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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.