Home / 39,904.07-55,070.09-21,999.04

Finding the Fourth Proportional to 39,904.07, 55,070.09 and 21,999.04

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Solution

The fourth proportional to 39,904.07, 55,070.09 and 21,999.04 is: 30,360.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.07 : 55,070.09 = 21,999.04 : x
  2. Step 2: Convert to fraction form
    39,904.07/55,070.09 = 21,999.04/x
  3. Step 3: Cross multiply
    39,904.07x = 55,070.09 × 21,999.04
  4. Step 4: Simplify right side
    39,904.07x = 1,211,488,947.54
  5. Step 5: Solve for x
    x = 1,211,488,947.54/39,904.07
  6. Step 6: Final answer
    x = 30,360.04

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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.