Home / 9,921.44-13,690.72-7,131.36

Finding the Fourth Proportional to 9,921.44, 13,690.72 and 7,131.36

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Solution

The fourth proportional to 9,921.44, 13,690.72 and 7,131.36 is: 9,840.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.44 : 13,690.72 = 7,131.36 : x
  2. Step 2: Convert to fraction form
    9,921.44/13,690.72 = 7,131.36/x
  3. Step 3: Cross multiply
    9,921.44x = 13,690.72 × 7,131.36
  4. Step 4: Simplify right side
    9,921.44x = 97,633,452.98
  5. Step 5: Solve for x
    x = 97,633,452.98/9,921.44
  6. Step 6: Final answer
    x = 9,840.65

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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.