Home / 39,869.75-55,019.99-21,964.34

Finding the Fourth Proportional to 39,869.75, 55,019.99 and 21,964.34

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Solution

The fourth proportional to 39,869.75, 55,019.99 and 21,964.34 is: 30,310.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,869.75 : 55,019.99 = 21,964.34 : x
  2. Step 2: Convert to fraction form
    39,869.75/55,019.99 = 21,964.34/x
  3. Step 3: Cross multiply
    39,869.75x = 55,019.99 × 21,964.34
  4. Step 4: Simplify right side
    39,869.75x = 1,208,477,382.23
  5. Step 5: Solve for x
    x = 1,208,477,382.23/39,869.75
  6. Step 6: Final answer
    x = 30,310.64

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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.