Home / 15,739.50-21,720.08-8,665.96

Finding the Fourth Proportional to 15,739.50, 21,720.08 and 8,665.96

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Solution

The fourth proportional to 15,739.50, 21,720.08 and 8,665.96 is: 11,958.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.50 : 21,720.08 = 8,665.96 : x
  2. Step 2: Convert to fraction form
    15,739.50/21,720.08 = 8,665.96/x
  3. Step 3: Cross multiply
    15,739.50x = 21,720.08 × 8,665.96
  4. Step 4: Simplify right side
    15,739.50x = 188,225,344.48
  5. Step 5: Solve for x
    x = 188,225,344.48/15,739.50
  6. Step 6: Final answer
    x = 11,958.79

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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.