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Finding the Fourth Proportional to 18,998.82, 28,468.80 and 14,313.78

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Solution

The fourth proportional to 18,998.82, 28,468.80 and 14,313.78 is: 21,448.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.82 : 28,468.80 = 14,313.78 : x
  2. Step 2: Convert to fraction form
    18,998.82/28,468.80 = 14,313.78/x
  3. Step 3: Cross multiply
    18,998.82x = 28,468.80 × 14,313.78
  4. Step 4: Simplify right side
    18,998.82x = 407,496,140.06
  5. Step 5: Solve for x
    x = 407,496,140.06/18,998.82
  6. Step 6: Final answer
    x = 21,448.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.