Home / 11,977.80-17,966.70-5,416.80

Finding the Fourth Proportional to 11,977.80, 17,966.70 and 5,416.80

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Solution

The fourth proportional to 11,977.80, 17,966.70 and 5,416.80 is: 8,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,977.80 : 17,966.70 = 5,416.80 : x
  2. Step 2: Convert to fraction form
    11,977.80/17,966.70 = 5,416.80/x
  3. Step 3: Cross multiply
    11,977.80x = 17,966.70 × 5,416.80
  4. Step 4: Simplify right side
    11,977.80x = 97,322,020.56
  5. Step 5: Solve for x
    x = 97,322,020.56/11,977.80
  6. Step 6: Final answer
    x = 8,125.20

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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.