Home / 39,311.20-54,249.54-21,406.30

Finding the Fourth Proportional to 39,311.20, 54,249.54 and 21,406.30

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Solution

The fourth proportional to 39,311.20, 54,249.54 and 21,406.30 is: 29,540.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,311.20 : 54,249.54 = 21,406.30 : x
  2. Step 2: Convert to fraction form
    39,311.20/54,249.54 = 21,406.30/x
  3. Step 3: Cross multiply
    39,311.20x = 54,249.54 × 21,406.30
  4. Step 4: Simplify right side
    39,311.20x = 1,161,281,928.10
  5. Step 5: Solve for x
    x = 1,161,281,928.10/39,311.20
  6. Step 6: Final answer
    x = 29,540.74

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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.