Home / 21,008.25-28,991.39-11,577.02

Finding the Fourth Proportional to 21,008.25, 28,991.39 and 11,577.02

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Solution

The fourth proportional to 21,008.25, 28,991.39 and 11,577.02 is: 15,976.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.25 : 28,991.39 = 11,577.02 : x
  2. Step 2: Convert to fraction form
    21,008.25/28,991.39 = 11,577.02/x
  3. Step 3: Cross multiply
    21,008.25x = 28,991.39 × 11,577.02
  4. Step 4: Simplify right side
    21,008.25x = 335,633,699.02
  5. Step 5: Solve for x
    x = 335,633,699.02/21,008.25
  6. Step 6: Final answer
    x = 15,976.28

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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.