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Finding the Fourth Proportional to 15,791.01, 21,792.77 and 9,078.27

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Solution

The fourth proportional to 15,791.01, 21,792.77 and 9,078.27 is: 12,528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,791.01 : 21,792.77 = 9,078.27 : x
  2. Step 2: Convert to fraction form
    15,791.01/21,792.77 = 9,078.27/x
  3. Step 3: Cross multiply
    15,791.01x = 21,792.77 × 9,078.27
  4. Step 4: Simplify right side
    15,791.01x = 197,840,650.11
  5. Step 5: Solve for x
    x = 197,840,650.11/15,791.01
  6. Step 6: Final answer
    x = 12,528.69

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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.