Home / 20,872.20-28,804.74-11,441.16

Finding the Fourth Proportional to 20,872.20, 28,804.74 and 11,441.16

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Solution

The fourth proportional to 20,872.20, 28,804.74 and 11,441.16 is: 15,789.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.20 : 28,804.74 = 11,441.16 : x
  2. Step 2: Convert to fraction form
    20,872.20/28,804.74 = 11,441.16/x
  3. Step 3: Cross multiply
    20,872.20x = 28,804.74 × 11,441.16
  4. Step 4: Simplify right side
    20,872.20x = 329,559,639.10
  5. Step 5: Solve for x
    x = 329,559,639.10/20,872.20
  6. Step 6: Final answer
    x = 15,789.41

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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.