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Finding the Fourth Proportional to 20,872.65, 28,804.09 and 11,441.19

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Solution

The fourth proportional to 20,872.65, 28,804.09 and 11,441.19 is: 15,788.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.65 : 28,804.09 = 11,441.19 : x
  2. Step 2: Convert to fraction form
    20,872.65/28,804.09 = 11,441.19/x
  3. Step 3: Cross multiply
    20,872.65x = 28,804.09 × 11,441.19
  4. Step 4: Simplify right side
    20,872.65x = 329,553,066.47
  5. Step 5: Solve for x
    x = 329,553,066.47/20,872.65
  6. Step 6: Final answer
    x = 15,788.75

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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.