Home / 21,010.25-28,994.16-11,450.15

Finding the Fourth Proportional to 21,010.25, 28,994.16 and 11,450.15

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Solution

The fourth proportional to 21,010.25, 28,994.16 and 11,450.15 is: 15,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.25 : 28,994.16 = 11,450.15 : x
  2. Step 2: Convert to fraction form
    21,010.25/28,994.16 = 11,450.15/x
  3. Step 3: Cross multiply
    21,010.25x = 28,994.16 × 11,450.15
  4. Step 4: Simplify right side
    21,010.25x = 331,987,293.22
  5. Step 5: Solve for x
    x = 331,987,293.22/21,010.25
  6. Step 6: Final answer
    x = 15,801.20

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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.