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Finding the Fourth Proportional to 18,716, 25,845.90 and 14,729.99

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Solution

The fourth proportional to 18,716, 25,845.90 and 14,729.99 is: 20,341.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716 : 25,845.90 = 14,729.99 : x
  2. Step 2: Convert to fraction form
    18,716/25,845.90 = 14,729.99/x
  3. Step 3: Cross multiply
    18,716x = 25,845.90 × 14,729.99
  4. Step 4: Simplify right side
    18,716x = 380,709,848.54
  5. Step 5: Solve for x
    x = 380,709,848.54/18,716
  6. Step 6: Final answer
    x = 20,341.41

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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.