Home / 21,183.51-31,755.83-7,322.79

Finding the Fourth Proportional to 21,183.51, 31,755.83 and 7,322.79

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Solution

The fourth proportional to 21,183.51, 31,755.83 and 7,322.79 is: 10,977.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.51 : 31,755.83 = 7,322.79 : x
  2. Step 2: Convert to fraction form
    21,183.51/31,755.83 = 7,322.79/x
  3. Step 3: Cross multiply
    21,183.51x = 31,755.83 × 7,322.79
  4. Step 4: Simplify right side
    21,183.51x = 232,541,237.75
  5. Step 5: Solve for x
    x = 232,541,237.75/21,183.51
  6. Step 6: Final answer
    x = 10,977.46

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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.