Home / 18,936.72-28,405.56-7,840.43

Finding the Fourth Proportional to 18,936.72, 28,405.56 and 7,840.43

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Solution

The fourth proportional to 18,936.72, 28,405.56 and 7,840.43 is: 11,760.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.72 : 28,405.56 = 7,840.43 : x
  2. Step 2: Convert to fraction form
    18,936.72/28,405.56 = 7,840.43/x
  3. Step 3: Cross multiply
    18,936.72x = 28,405.56 × 7,840.43
  4. Step 4: Simplify right side
    18,936.72x = 222,711,662.76
  5. Step 5: Solve for x
    x = 222,711,662.76/18,936.72
  6. Step 6: Final answer
    x = 11,760.84

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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.