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Finding the Fourth Proportional to 18,678.99, 25,809.82 and 14,933.08

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Solution

The fourth proportional to 18,678.99, 25,809.82 and 14,933.08 is: 20,633.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.99 : 25,809.82 = 14,933.08 : x
  2. Step 2: Convert to fraction form
    18,678.99/25,809.82 = 14,933.08/x
  3. Step 3: Cross multiply
    18,678.99x = 25,809.82 × 14,933.08
  4. Step 4: Simplify right side
    18,678.99x = 385,420,185.77
  5. Step 5: Solve for x
    x = 385,420,185.77/18,678.99
  6. Step 6: Final answer
    x = 20,633.88

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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.