Home / 20,962-28,928.36-11,530.36

Finding the Fourth Proportional to 20,962, 28,928.36 and 11,530.36

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Solution

The fourth proportional to 20,962, 28,928.36 and 11,530.36 is: 15,912.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962 : 28,928.36 = 11,530.36 : x
  2. Step 2: Convert to fraction form
    20,962/28,928.36 = 11,530.36/x
  3. Step 3: Cross multiply
    20,962x = 28,928.36 × 11,530.36
  4. Step 4: Simplify right side
    20,962x = 333,554,405.01
  5. Step 5: Solve for x
    x = 333,554,405.01/20,962
  6. Step 6: Final answer
    x = 15,912.34

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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.