Home / 11,921.51-16,450.01-7,140.34

Finding the Fourth Proportional to 11,921.51, 16,450.01 and 7,140.34

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Solution

The fourth proportional to 11,921.51, 16,450.01 and 7,140.34 is: 9,852.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.51 : 16,450.01 = 7,140.34 : x
  2. Step 2: Convert to fraction form
    11,921.51/16,450.01 = 7,140.34/x
  3. Step 3: Cross multiply
    11,921.51x = 16,450.01 × 7,140.34
  4. Step 4: Simplify right side
    11,921.51x = 117,458,546.45
  5. Step 5: Solve for x
    x = 117,458,546.45/11,921.51
  6. Step 6: Final answer
    x = 9,852.66

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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.