Home / 39,909.99-55,074.12-21,760.32

Finding the Fourth Proportional to 39,909.99, 55,074.12 and 21,760.32

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Solution

The fourth proportional to 39,909.99, 55,074.12 and 21,760.32 is: 30,028.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,909.99 : 55,074.12 = 21,760.32 : x
  2. Step 2: Convert to fraction form
    39,909.99/55,074.12 = 21,760.32/x
  3. Step 3: Cross multiply
    39,909.99x = 55,074.12 × 21,760.32
  4. Step 4: Simplify right side
    39,909.99x = 1,198,430,474.92
  5. Step 5: Solve for x
    x = 1,198,430,474.92/39,909.99
  6. Step 6: Final answer
    x = 30,028.33

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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.