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Finding the Fourth Proportional to 18,783.69, 25,889.99 and 14,994.71

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Solution

The fourth proportional to 18,783.69, 25,889.99 and 14,994.71 is: 20,667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.69 : 25,889.99 = 14,994.71 : x
  2. Step 2: Convert to fraction form
    18,783.69/25,889.99 = 14,994.71/x
  3. Step 3: Cross multiply
    18,783.69x = 25,889.99 × 14,994.71
  4. Step 4: Simplify right side
    18,783.69x = 388,212,891.95
  5. Step 5: Solve for x
    x = 388,212,891.95/18,783.69
  6. Step 6: Final answer
    x = 20,667.55

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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.