Home / 18,690.12-25,777.80-11,976.39

Finding the Fourth Proportional to 18,690.12, 25,777.80 and 11,976.39

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Solution

The fourth proportional to 18,690.12, 25,777.80 and 11,976.39 is: 16,518.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.12 : 25,777.80 = 11,976.39 : x
  2. Step 2: Convert to fraction form
    18,690.12/25,777.80 = 11,976.39/x
  3. Step 3: Cross multiply
    18,690.12x = 25,777.80 × 11,976.39
  4. Step 4: Simplify right side
    18,690.12x = 308,724,986.14
  5. Step 5: Solve for x
    x = 308,724,986.14/18,690.12
  6. Step 6: Final answer
    x = 16,518.08

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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.