Home / 39,904.54-55,070.75-21,999.51

Finding the Fourth Proportional to 39,904.54, 55,070.75 and 21,999.51

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Solution

The fourth proportional to 39,904.54, 55,070.75 and 21,999.51 is: 30,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.54 : 55,070.75 = 21,999.51 : x
  2. Step 2: Convert to fraction form
    39,904.54/55,070.75 = 21,999.51/x
  3. Step 3: Cross multiply
    39,904.54x = 55,070.75 × 21,999.51
  4. Step 4: Simplify right side
    39,904.54x = 1,211,529,570.33
  5. Step 5: Solve for x
    x = 1,211,529,570.33/39,904.54
  6. Step 6: Final answer
    x = 30,360.70

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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.