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Finding the Fourth Proportional to 28,802, 39,760.08 and 20,311.04

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Solution

The fourth proportional to 28,802, 39,760.08 and 20,311.04 is: 28,038.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,802 : 39,760.08 = 20,311.04 : x
  2. Step 2: Convert to fraction form
    28,802/39,760.08 = 20,311.04/x
  3. Step 3: Cross multiply
    28,802x = 39,760.08 × 20,311.04
  4. Step 4: Simplify right side
    28,802x = 807,568,575.28
  5. Step 5: Solve for x
    x = 807,568,575.28/28,802
  6. Step 6: Final answer
    x = 28,038.63

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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.