Home / 39,904.57-55,070.78-21,999.54

Finding the Fourth Proportional to 39,904.57, 55,070.78 and 21,999.54

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Solution

The fourth proportional to 39,904.57, 55,070.78 and 21,999.54 is: 30,360.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.57 : 55,070.78 = 21,999.54 : x
  2. Step 2: Convert to fraction form
    39,904.57/55,070.78 = 21,999.54/x
  3. Step 3: Cross multiply
    39,904.57x = 55,070.78 × 21,999.54
  4. Step 4: Simplify right side
    39,904.57x = 1,211,531,827.44
  5. Step 5: Solve for x
    x = 1,211,531,827.44/39,904.57
  6. Step 6: Final answer
    x = 30,360.73

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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.