Home / 39,435.82-54,420.42-21,529.78

Finding the Fourth Proportional to 39,435.82, 54,420.42 and 21,529.78

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Solution

The fourth proportional to 39,435.82, 54,420.42 and 21,529.78 is: 29,710.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,435.82 : 54,420.42 = 21,529.78 : x
  2. Step 2: Convert to fraction form
    39,435.82/54,420.42 = 21,529.78/x
  3. Step 3: Cross multiply
    39,435.82x = 54,420.42 × 21,529.78
  4. Step 4: Simplify right side
    39,435.82x = 1,171,659,670.11
  5. Step 5: Solve for x
    x = 1,171,659,670.11/39,435.82
  6. Step 6: Final answer
    x = 29,710.54

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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.