Home / 12,219.25-18,338.08-8,940.80

Finding the Fourth Proportional to 12,219.25, 18,338.08 and 8,940.80

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Solution

The fourth proportional to 12,219.25, 18,338.08 and 8,940.80 is: 13,417.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.25 : 18,338.08 = 8,940.80 : x
  2. Step 2: Convert to fraction form
    12,219.25/18,338.08 = 8,940.80/x
  3. Step 3: Cross multiply
    12,219.25x = 18,338.08 × 8,940.80
  4. Step 4: Simplify right side
    12,219.25x = 163,957,013.97
  5. Step 5: Solve for x
    x = 163,957,013.97/12,219.25
  6. Step 6: Final answer
    x = 13,417.93

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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.