Home / 19,786.20-27,311.31-13,077.78

Finding the Fourth Proportional to 19,786.20, 27,311.31 and 13,077.78

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Solution

The fourth proportional to 19,786.20, 27,311.31 and 13,077.78 is: 18,051.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,786.20 : 27,311.31 = 13,077.78 : x
  2. Step 2: Convert to fraction form
    19,786.20/27,311.31 = 13,077.78/x
  3. Step 3: Cross multiply
    19,786.20x = 27,311.31 × 13,077.78
  4. Step 4: Simplify right side
    19,786.20x = 357,171,303.69
  5. Step 5: Solve for x
    x = 357,171,303.69/19,786.20
  6. Step 6: Final answer
    x = 18,051.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.