Home / 15,739.37-21,720.41-8,665.79

Finding the Fourth Proportional to 15,739.37, 21,720.41 and 8,665.79

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Solution

The fourth proportional to 15,739.37, 21,720.41 and 8,665.79 is: 11,958.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.37 : 21,720.41 = 8,665.79 : x
  2. Step 2: Convert to fraction form
    15,739.37/21,720.41 = 8,665.79/x
  3. Step 3: Cross multiply
    15,739.37x = 21,720.41 × 8,665.79
  4. Step 4: Simplify right side
    15,739.37x = 188,224,392.34
  5. Step 5: Solve for x
    x = 188,224,392.34/15,739.37
  6. Step 6: Final answer
    x = 11,958.83

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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.