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Finding the Fourth Proportional to 28,986, 40,002.72 and 16,410.80

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Solution

The fourth proportional to 28,986, 40,002.72 and 16,410.80 is: 22,648.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986 : 40,002.72 = 16,410.80 : x
  2. Step 2: Convert to fraction form
    28,986/40,002.72 = 16,410.80/x
  3. Step 3: Cross multiply
    28,986x = 40,002.72 × 16,410.80
  4. Step 4: Simplify right side
    28,986x = 656,476,637.38
  5. Step 5: Solve for x
    x = 656,476,637.38/28,986
  6. Step 6: Final answer
    x = 22,648.06

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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.