Home / 20,911.04-28,858.08-11,960

Finding the Fourth Proportional to 20,911.04, 28,858.08 and 11,960

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Solution

The fourth proportional to 20,911.04, 28,858.08 and 11,960 is: 16,505.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.04 : 28,858.08 = 11,960 : x
  2. Step 2: Convert to fraction form
    20,911.04/28,858.08 = 11,960/x
  3. Step 3: Cross multiply
    20,911.04x = 28,858.08 × 11,960
  4. Step 4: Simplify right side
    20,911.04x = 345,142,636.80
  5. Step 5: Solve for x
    x = 345,142,636.80/20,911.04
  6. Step 6: Final answer
    x = 16,505.28

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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.