Home / 20,811.06-28,720.16-11,739.46

Finding the Fourth Proportional to 20,811.06, 28,720.16 and 11,739.46

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Solution

The fourth proportional to 20,811.06, 28,720.16 and 11,739.46 is: 16,200.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.06 : 28,720.16 = 11,739.46 : x
  2. Step 2: Convert to fraction form
    20,811.06/28,720.16 = 11,739.46/x
  3. Step 3: Cross multiply
    20,811.06x = 28,720.16 × 11,739.46
  4. Step 4: Simplify right side
    20,811.06x = 337,159,169.51
  5. Step 5: Solve for x
    x = 337,159,169.51/20,811.06
  6. Step 6: Final answer
    x = 16,200.96

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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.