Home / 39,195.86-54,090.38-21,290.72

Finding the Fourth Proportional to 39,195.86, 54,090.38 and 21,290.72

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Solution

The fourth proportional to 39,195.86, 54,090.38 and 21,290.72 is: 29,381.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,195.86 : 54,090.38 = 21,290.72 : x
  2. Step 2: Convert to fraction form
    39,195.86/54,090.38 = 21,290.72/x
  3. Step 3: Cross multiply
    39,195.86x = 54,090.38 × 21,290.72
  4. Step 4: Simplify right side
    39,195.86x = 1,151,622,918.05
  5. Step 5: Solve for x
    x = 1,151,622,918.05/39,195.86
  6. Step 6: Final answer
    x = 29,381.24

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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.