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Finding the Fourth Proportional to 21,791.60, 30,073.08 and 12,360.56

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Solution

The fourth proportional to 21,791.60, 30,073.08 and 12,360.56 is: 17,057.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.60 : 30,073.08 = 12,360.56 : x
  2. Step 2: Convert to fraction form
    21,791.60/30,073.08 = 12,360.56/x
  3. Step 3: Cross multiply
    21,791.60x = 30,073.08 × 12,360.56
  4. Step 4: Simplify right side
    21,791.60x = 371,720,109.72
  5. Step 5: Solve for x
    x = 371,720,109.72/21,791.60
  6. Step 6: Final answer
    x = 17,057.95

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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.