Home / 13,791.15-20,690.37-7,215.57

Finding the Fourth Proportional to 13,791.15, 20,690.37 and 7,215.57

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Solution

The fourth proportional to 13,791.15, 20,690.37 and 7,215.57 is: 10,825.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.15 : 20,690.37 = 7,215.57 : x
  2. Step 2: Convert to fraction form
    13,791.15/20,690.37 = 7,215.57/x
  3. Step 3: Cross multiply
    13,791.15x = 20,690.37 × 7,215.57
  4. Step 4: Simplify right side
    13,791.15x = 149,292,813.06
  5. Step 5: Solve for x
    x = 149,292,813.06/13,791.15
  6. Step 6: Final answer
    x = 10,825.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.