Home / 39,150.12-54,027.21-21,245.45

Finding the Fourth Proportional to 39,150.12, 54,027.21 and 21,245.45

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Solution

The fourth proportional to 39,150.12, 54,027.21 and 21,245.45 is: 29,318.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,150.12 : 54,027.21 = 21,245.45 : x
  2. Step 2: Convert to fraction form
    39,150.12/54,027.21 = 21,245.45/x
  3. Step 3: Cross multiply
    39,150.12x = 54,027.21 × 21,245.45
  4. Step 4: Simplify right side
    39,150.12x = 1,147,832,118.56
  5. Step 5: Solve for x
    x = 1,147,832,118.56/39,150.12
  6. Step 6: Final answer
    x = 29,318.74

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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.