Home / 54,189.13-81,290.62-20,918.71

Finding the Fourth Proportional to 54,189.13, 81,290.62 and 20,918.71

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Solution

The fourth proportional to 54,189.13, 81,290.62 and 20,918.71 is: 31,380.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,189.13 : 81,290.62 = 20,918.71 : x
  2. Step 2: Convert to fraction form
    54,189.13/81,290.62 = 20,918.71/x
  3. Step 3: Cross multiply
    54,189.13x = 81,290.62 × 20,918.71
  4. Step 4: Simplify right side
    54,189.13x = 1,700,494,905.50
  5. Step 5: Solve for x
    x = 1,700,494,905.50/54,189.13
  6. Step 6: Final answer
    x = 31,380.74

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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.