Home / 21,007.16-28,989.75-11,447.03

Finding the Fourth Proportional to 21,007.16, 28,989.75 and 11,447.03

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Solution

The fourth proportional to 21,007.16, 28,989.75 and 11,447.03 is: 15,796.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.16 : 28,989.75 = 11,447.03 : x
  2. Step 2: Convert to fraction form
    21,007.16/28,989.75 = 11,447.03/x
  3. Step 3: Cross multiply
    21,007.16x = 28,989.75 × 11,447.03
  4. Step 4: Simplify right side
    21,007.16x = 331,846,392.99
  5. Step 5: Solve for x
    x = 331,846,392.99/21,007.16
  6. Step 6: Final answer
    x = 15,796.83

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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.