Home / 18,781.84-28,131.82-9,405.50

Finding the Fourth Proportional to 18,781.84, 28,131.82 and 9,405.50

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Solution

The fourth proportional to 18,781.84, 28,131.82 and 9,405.50 is: 14,087.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.84 : 28,131.82 = 9,405.50 : x
  2. Step 2: Convert to fraction form
    18,781.84/28,131.82 = 9,405.50/x
  3. Step 3: Cross multiply
    18,781.84x = 28,131.82 × 9,405.50
  4. Step 4: Simplify right side
    18,781.84x = 264,593,879.83
  5. Step 5: Solve for x
    x = 264,593,879.83/18,781.84
  6. Step 6: Final answer
    x = 14,087.75

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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.