Home / 12,280.80-16,912.67-11,173.64

Finding the Fourth Proportional to 12,280.80, 16,912.67 and 11,173.64

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Solution

The fourth proportional to 12,280.80, 16,912.67 and 11,173.64 is: 15,387.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.80 : 16,912.67 = 11,173.64 : x
  2. Step 2: Convert to fraction form
    12,280.80/16,912.67 = 11,173.64/x
  3. Step 3: Cross multiply
    12,280.80x = 16,912.67 × 11,173.64
  4. Step 4: Simplify right side
    12,280.80x = 188,975,945.59
  5. Step 5: Solve for x
    x = 188,975,945.59/12,280.80
  6. Step 6: Final answer
    x = 15,387.92

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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.