Home / 54,191.80-81,291.32-20,912.12

Finding the Fourth Proportional to 54,191.80, 81,291.32 and 20,912.12

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Solution

The fourth proportional to 54,191.80, 81,291.32 and 20,912.12 is: 31,369.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,191.80 : 81,291.32 = 20,912.12 : x
  2. Step 2: Convert to fraction form
    54,191.80/81,291.32 = 20,912.12/x
  3. Step 3: Cross multiply
    54,191.80x = 81,291.32 × 20,912.12
  4. Step 4: Simplify right side
    54,191.80x = 1,699,973,838.80
  5. Step 5: Solve for x
    x = 1,699,973,838.80/54,191.80
  6. Step 6: Final answer
    x = 31,369.58

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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.