Home / 11,921.48-16,445.94-7,138.16

Finding the Fourth Proportional to 11,921.48, 16,445.94 and 7,138.16

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Solution

The fourth proportional to 11,921.48, 16,445.94 and 7,138.16 is: 9,847.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.48 : 16,445.94 = 7,138.16 : x
  2. Step 2: Convert to fraction form
    11,921.48/16,445.94 = 7,138.16/x
  3. Step 3: Cross multiply
    11,921.48x = 16,445.94 × 7,138.16
  4. Step 4: Simplify right side
    11,921.48x = 117,393,751.07
  5. Step 5: Solve for x
    x = 117,393,751.07/11,921.48
  6. Step 6: Final answer
    x = 9,847.25

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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.