Home / 21,009.43-28,992.64-11,449.41

Finding the Fourth Proportional to 21,009.43, 28,992.64 and 11,449.41

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Solution

The fourth proportional to 21,009.43, 28,992.64 and 11,449.41 is: 15,799.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.43 : 28,992.64 = 11,449.41 : x
  2. Step 2: Convert to fraction form
    21,009.43/28,992.64 = 11,449.41/x
  3. Step 3: Cross multiply
    21,009.43x = 28,992.64 × 11,449.41
  4. Step 4: Simplify right side
    21,009.43x = 331,948,622.34
  5. Step 5: Solve for x
    x = 331,948,622.34/21,009.43
  6. Step 6: Final answer
    x = 15,799.98

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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.