Home / 38,979.21-53,791.31-21,074.21

Finding the Fourth Proportional to 38,979.21, 53,791.31 and 21,074.21

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Solution

The fourth proportional to 38,979.21, 53,791.31 and 21,074.21 is: 29,082.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,979.21 : 53,791.31 = 21,074.21 : x
  2. Step 2: Convert to fraction form
    38,979.21/53,791.31 = 21,074.21/x
  3. Step 3: Cross multiply
    38,979.21x = 53,791.31 × 21,074.21
  4. Step 4: Simplify right side
    38,979.21x = 1,133,609,363.12
  5. Step 5: Solve for x
    x = 1,133,609,363.12/38,979.21
  6. Step 6: Final answer
    x = 29,082.41

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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.