Home / 39,412.35-54,389.19-21,507.75

Finding the Fourth Proportional to 39,412.35, 54,389.19 and 21,507.75

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Solution

The fourth proportional to 39,412.35, 54,389.19 and 21,507.75 is: 29,680.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,412.35 : 54,389.19 = 21,507.75 : x
  2. Step 2: Convert to fraction form
    39,412.35/54,389.19 = 21,507.75/x
  3. Step 3: Cross multiply
    39,412.35x = 54,389.19 × 21,507.75
  4. Step 4: Simplify right side
    39,412.35x = 1,169,789,181.88
  5. Step 5: Solve for x
    x = 1,169,789,181.88/39,412.35
  6. Step 6: Final answer
    x = 29,680.78

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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.