Home / 21,080.39-29,129.49-20,055.60

Finding the Fourth Proportional to 21,080.39, 29,129.49 and 20,055.60

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Solution

The fourth proportional to 21,080.39, 29,129.49 and 20,055.60 is: 27,713.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.39 : 29,129.49 = 20,055.60 : x
  2. Step 2: Convert to fraction form
    21,080.39/29,129.49 = 20,055.60/x
  3. Step 3: Cross multiply
    21,080.39x = 29,129.49 × 20,055.60
  4. Step 4: Simplify right side
    21,080.39x = 584,209,399.64
  5. Step 5: Solve for x
    x = 584,209,399.64/21,080.39
  6. Step 6: Final answer
    x = 27,713.41

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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.