Home / 21,007.23-28,989.92-11,447.64

Finding the Fourth Proportional to 21,007.23, 28,989.92 and 11,447.64

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Solution

The fourth proportional to 21,007.23, 28,989.92 and 11,447.64 is: 15,797.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.23 : 28,989.92 = 11,447.64 : x
  2. Step 2: Convert to fraction form
    21,007.23/28,989.92 = 11,447.64/x
  3. Step 3: Cross multiply
    21,007.23x = 28,989.92 × 11,447.64
  4. Step 4: Simplify right side
    21,007.23x = 331,866,110.55
  5. Step 5: Solve for x
    x = 331,866,110.55/21,007.23
  6. Step 6: Final answer
    x = 15,797.71

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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.