Home / 21,008.66-28,991.93-11,577.29

Finding the Fourth Proportional to 21,008.66, 28,991.93 and 11,577.29

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Solution

The fourth proportional to 21,008.66, 28,991.93 and 11,577.29 is: 15,976.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.66 : 28,991.93 = 11,577.29 : x
  2. Step 2: Convert to fraction form
    21,008.66/28,991.93 = 11,577.29/x
  3. Step 3: Cross multiply
    21,008.66x = 28,991.93 × 11,577.29
  4. Step 4: Simplify right side
    21,008.66x = 335,647,778.42
  5. Step 5: Solve for x
    x = 335,647,778.42/21,008.66
  6. Step 6: Final answer
    x = 15,976.64

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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.