Home / 15,779.37-21,791.73-13,100.29

Finding the Fourth Proportional to 15,779.37, 21,791.73 and 13,100.29

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Solution

The fourth proportional to 15,779.37, 21,791.73 and 13,100.29 is: 18,091.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.37 : 21,791.73 = 13,100.29 : x
  2. Step 2: Convert to fraction form
    15,779.37/21,791.73 = 13,100.29/x
  3. Step 3: Cross multiply
    15,779.37x = 21,791.73 × 13,100.29
  4. Step 4: Simplify right side
    15,779.37x = 285,477,982.60
  5. Step 5: Solve for x
    x = 285,477,982.60/15,779.37
  6. Step 6: Final answer
    x = 18,091.85

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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.