Home / 21,010.80-28,994.73-11,579.37

Finding the Fourth Proportional to 21,010.80, 28,994.73 and 11,579.37

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Solution

The fourth proportional to 21,010.80, 28,994.73 and 11,579.37 is: 15,979.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.80 : 28,994.73 = 11,579.37 : x
  2. Step 2: Convert to fraction form
    21,010.80/28,994.73 = 11,579.37/x
  3. Step 3: Cross multiply
    21,010.80x = 28,994.73 × 11,579.37
  4. Step 4: Simplify right side
    21,010.80x = 335,740,706.72
  5. Step 5: Solve for x
    x = 335,740,706.72/21,010.80
  6. Step 6: Final answer
    x = 15,979.43

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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.