Home / 18,783.07-28,174.62-7,687.84

Finding the Fourth Proportional to 18,783.07, 28,174.62 and 7,687.84

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Solution

The fourth proportional to 18,783.07, 28,174.62 and 7,687.84 is: 11,531.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.07 : 28,174.62 = 7,687.84 : x
  2. Step 2: Convert to fraction form
    18,783.07/28,174.62 = 7,687.84/x
  3. Step 3: Cross multiply
    18,783.07x = 28,174.62 × 7,687.84
  4. Step 4: Simplify right side
    18,783.07x = 216,601,970.62
  5. Step 5: Solve for x
    x = 216,601,970.62/18,783.07
  6. Step 6: Final answer
    x = 11,531.77

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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.