Home / 39,904.25-55,070.35-21,999.23

Finding the Fourth Proportional to 39,904.25, 55,070.35 and 21,999.23

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Solution

The fourth proportional to 39,904.25, 55,070.35 and 21,999.23 is: 30,360.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.25 : 55,070.35 = 21,999.23 : x
  2. Step 2: Convert to fraction form
    39,904.25/55,070.35 = 21,999.23/x
  3. Step 3: Cross multiply
    39,904.25x = 55,070.35 × 21,999.23
  4. Step 4: Simplify right side
    39,904.25x = 1,211,505,171.99
  5. Step 5: Solve for x
    x = 1,211,505,171.99/39,904.25
  6. Step 6: Final answer
    x = 30,360.30

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Double scale
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Similar ratio
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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.