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Finding the Fourth Proportional to 18,716.88, 25,817.24 and 12,341.64

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Solution

The fourth proportional to 18,716.88, 25,817.24 and 12,341.64 is: 17,023.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.88 : 25,817.24 = 12,341.64 : x
  2. Step 2: Convert to fraction form
    18,716.88/25,817.24 = 12,341.64/x
  3. Step 3: Cross multiply
    18,716.88x = 25,817.24 × 12,341.64
  4. Step 4: Simplify right side
    18,716.88x = 318,627,081.87
  5. Step 5: Solve for x
    x = 318,627,081.87/18,716.88
  6. Step 6: Final answer
    x = 17,023.51

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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.