Home / 20,995.52-28,973.82-11,564.09

Finding the Fourth Proportional to 20,995.52, 28,973.82 and 11,564.09

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Solution

The fourth proportional to 20,995.52, 28,973.82 and 11,564.09 is: 15,958.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.52 : 28,973.82 = 11,564.09 : x
  2. Step 2: Convert to fraction form
    20,995.52/28,973.82 = 11,564.09/x
  3. Step 3: Cross multiply
    20,995.52x = 28,973.82 × 11,564.09
  4. Step 4: Simplify right side
    20,995.52x = 335,055,862.12
  5. Step 5: Solve for x
    x = 335,055,862.12/20,995.52
  6. Step 6: Final answer
    x = 15,958.45

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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.