Home / 21,004.80-28,991.57-13,053.03

Finding the Fourth Proportional to 21,004.80, 28,991.57 and 13,053.03

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Solution

The fourth proportional to 21,004.80, 28,991.57 and 13,053.03 is: 18,016.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.80 : 28,991.57 = 13,053.03 : x
  2. Step 2: Convert to fraction form
    21,004.80/28,991.57 = 13,053.03/x
  3. Step 3: Cross multiply
    21,004.80x = 28,991.57 × 13,053.03
  4. Step 4: Simplify right side
    21,004.80x = 378,427,767.69
  5. Step 5: Solve for x
    x = 378,427,767.69/21,004.80
  6. Step 6: Final answer
    x = 18,016.25

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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.