Home / 20,858.14-28,784.22-11,427.04

Finding the Fourth Proportional to 20,858.14, 28,784.22 and 11,427.04

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Solution

The fourth proportional to 20,858.14, 28,784.22 and 11,427.04 is: 15,769.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.14 : 28,784.22 = 11,427.04 : x
  2. Step 2: Convert to fraction form
    20,858.14/28,784.22 = 11,427.04/x
  3. Step 3: Cross multiply
    20,858.14x = 28,784.22 × 11,427.04
  4. Step 4: Simplify right side
    20,858.14x = 328,918,433.31
  5. Step 5: Solve for x
    x = 328,918,433.31/20,858.14
  6. Step 6: Final answer
    x = 15,769.31

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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.