Home / 39,684.42-54,765.16-21,781.09

Finding the Fourth Proportional to 39,684.42, 54,765.16 and 21,781.09

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Solution

The fourth proportional to 39,684.42, 54,765.16 and 21,781.09 is: 30,058.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,684.42 : 54,765.16 = 21,781.09 : x
  2. Step 2: Convert to fraction form
    39,684.42/54,765.16 = 21,781.09/x
  3. Step 3: Cross multiply
    39,684.42x = 54,765.16 × 21,781.09
  4. Step 4: Simplify right side
    39,684.42x = 1,192,844,878.82
  5. Step 5: Solve for x
    x = 1,192,844,878.82/39,684.42
  6. Step 6: Final answer
    x = 30,058.27

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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.