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Finding the Fourth Proportional to 18,509.20, 27,776.09 and 8,649.23

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Solution

The fourth proportional to 18,509.20, 27,776.09 and 8,649.23 is: 12,979.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.20 : 27,776.09 = 8,649.23 : x
  2. Step 2: Convert to fraction form
    18,509.20/27,776.09 = 8,649.23/x
  3. Step 3: Cross multiply
    18,509.20x = 27,776.09 × 8,649.23
  4. Step 4: Simplify right side
    18,509.20x = 240,241,673.65
  5. Step 5: Solve for x
    x = 240,241,673.65/18,509.20
  6. Step 6: Final answer
    x = 12,979.58

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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.