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Finding the Fourth Proportional to 14,791.89, 20,412.73 and 8,077.90

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Solution

The fourth proportional to 14,791.89, 20,412.73 and 8,077.90 is: 11,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,791.89 : 20,412.73 = 8,077.90 : x
  2. Step 2: Convert to fraction form
    14,791.89/20,412.73 = 8,077.90/x
  3. Step 3: Cross multiply
    14,791.89x = 20,412.73 × 8,077.90
  4. Step 4: Simplify right side
    14,791.89x = 164,891,991.67
  5. Step 5: Solve for x
    x = 164,891,991.67/14,791.89
  6. Step 6: Final answer
    x = 11,147.46

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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.