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Finding the Fourth Proportional to 18,723.05, 25,813.18 and 14,420.97

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Solution

The fourth proportional to 18,723.05, 25,813.18 and 14,420.97 is: 19,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.05 : 25,813.18 = 14,420.97 : x
  2. Step 2: Convert to fraction form
    18,723.05/25,813.18 = 14,420.97/x
  3. Step 3: Cross multiply
    18,723.05x = 25,813.18 × 14,420.97
  4. Step 4: Simplify right side
    18,723.05x = 372,251,112.41
  5. Step 5: Solve for x
    x = 372,251,112.41/18,723.05
  6. Step 6: Final answer
    x = 19,881.97

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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.