Home / 39,311.52-54,249.12-21,406.74

Finding the Fourth Proportional to 39,311.52, 54,249.12 and 21,406.74

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Solution

The fourth proportional to 39,311.52, 54,249.12 and 21,406.74 is: 29,540.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,311.52 : 54,249.12 = 21,406.74 : x
  2. Step 2: Convert to fraction form
    39,311.52/54,249.12 = 21,406.74/x
  3. Step 3: Cross multiply
    39,311.52x = 54,249.12 × 21,406.74
  4. Step 4: Simplify right side
    39,311.52x = 1,161,296,807.07
  5. Step 5: Solve for x
    x = 1,161,296,807.07/39,311.52
  6. Step 6: Final answer
    x = 29,540.88

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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.