Home / 39,904.68-55,065.94-21,998.68

Finding the Fourth Proportional to 39,904.68, 55,065.94 and 21,998.68

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Solution

The fourth proportional to 39,904.68, 55,065.94 and 21,998.68 is: 30,356.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.68 : 55,065.94 = 21,998.68 : x
  2. Step 2: Convert to fraction form
    39,904.68/55,065.94 = 21,998.68/x
  3. Step 3: Cross multiply
    39,904.68x = 55,065.94 × 21,998.68
  4. Step 4: Simplify right side
    39,904.68x = 1,211,377,992.96
  5. Step 5: Solve for x
    x = 1,211,377,992.96/39,904.68
  6. Step 6: Final answer
    x = 30,356.79

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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.