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Finding the Fourth Proportional to 27,189.20, 40,783.80 and 20,277.20

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Solution

The fourth proportional to 27,189.20, 40,783.80 and 20,277.20 is: 30,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,189.20 : 40,783.80 = 20,277.20 : x
  2. Step 2: Convert to fraction form
    27,189.20/40,783.80 = 20,277.20/x
  3. Step 3: Cross multiply
    27,189.20x = 40,783.80 × 20,277.20
  4. Step 4: Simplify right side
    27,189.20x = 826,981,269.36
  5. Step 5: Solve for x
    x = 826,981,269.36/27,189.20
  6. Step 6: Final answer
    x = 30,415.80

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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.