Home / 30,542.72-45,736.32-20,122.88

Finding the Fourth Proportional to 30,542.72, 45,736.32 and 20,122.88

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Solution

The fourth proportional to 30,542.72, 45,736.32 and 20,122.88 is: 30,133.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,542.72 : 45,736.32 = 20,122.88 : x
  2. Step 2: Convert to fraction form
    30,542.72/45,736.32 = 20,122.88/x
  3. Step 3: Cross multiply
    30,542.72x = 45,736.32 × 20,122.88
  4. Step 4: Simplify right side
    30,542.72x = 920,346,479.00
  5. Step 5: Solve for x
    x = 920,346,479.00/30,542.72
  6. Step 6: Final answer
    x = 30,133.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.