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Finding the Fourth Proportional to 18,739.36, 28,109.94 and 7,051.69

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Solution

The fourth proportional to 18,739.36, 28,109.94 and 7,051.69 is: 10,577.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.36 : 28,109.94 = 7,051.69 : x
  2. Step 2: Convert to fraction form
    18,739.36/28,109.94 = 7,051.69/x
  3. Step 3: Cross multiply
    18,739.36x = 28,109.94 × 7,051.69
  4. Step 4: Simplify right side
    18,739.36x = 198,222,582.80
  5. Step 5: Solve for x
    x = 198,222,582.80/18,739.36
  6. Step 6: Final answer
    x = 10,577.87

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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.