Home / 18,666.46-27,998.70-6,978.79

Finding the Fourth Proportional to 18,666.46, 27,998.70 and 6,978.79

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Solution

The fourth proportional to 18,666.46, 27,998.70 and 6,978.79 is: 10,467.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.46 : 27,998.70 = 6,978.79 : x
  2. Step 2: Convert to fraction form
    18,666.46/27,998.70 = 6,978.79/x
  3. Step 3: Cross multiply
    18,666.46x = 27,998.70 × 6,978.79
  4. Step 4: Simplify right side
    18,666.46x = 195,397,047.57
  5. Step 5: Solve for x
    x = 195,397,047.57/18,666.46
  6. Step 6: Final answer
    x = 10,467.81

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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.