Home / 54,156.09-81,212.67-20,857.80

Finding the Fourth Proportional to 54,156.09, 81,212.67 and 20,857.80

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Solution

The fourth proportional to 54,156.09, 81,212.67 and 20,857.80 is: 31,278.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,156.09 : 81,212.67 = 20,857.80 : x
  2. Step 2: Convert to fraction form
    54,156.09/81,212.67 = 20,857.80/x
  3. Step 3: Cross multiply
    54,156.09x = 81,212.67 × 20,857.80
  4. Step 4: Simplify right side
    54,156.09x = 1,693,917,628.33
  5. Step 5: Solve for x
    x = 1,693,917,628.33/54,156.09
  6. Step 6: Final answer
    x = 31,278.43

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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.