Home / 20,872.63-28,804.22-11,440.99

Finding the Fourth Proportional to 20,872.63, 28,804.22 and 11,440.99

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Solution

The fourth proportional to 20,872.63, 28,804.22 and 11,440.99 is: 15,788.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.63 : 28,804.22 = 11,440.99 : x
  2. Step 2: Convert to fraction form
    20,872.63/28,804.22 = 11,440.99/x
  3. Step 3: Cross multiply
    20,872.63x = 28,804.22 × 11,440.99
  4. Step 4: Simplify right side
    20,872.63x = 329,548,792.98
  5. Step 5: Solve for x
    x = 329,548,792.98/20,872.63
  6. Step 6: Final answer
    x = 15,788.56

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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.