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Finding the Fourth Proportional to 18,744.80, 28,130.16 and 7,067.84

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Solution

The fourth proportional to 18,744.80, 28,130.16 and 7,067.84 is: 10,606.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.80 : 28,130.16 = 7,067.84 : x
  2. Step 2: Convert to fraction form
    18,744.80/28,130.16 = 7,067.84/x
  3. Step 3: Cross multiply
    18,744.80x = 28,130.16 × 7,067.84
  4. Step 4: Simplify right side
    18,744.80x = 198,819,470.05
  5. Step 5: Solve for x
    x = 198,819,470.05/18,744.80
  6. Step 6: Final answer
    x = 10,606.65

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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.