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Finding the Fourth Proportional to 18,389.80, 27,563.10 and 8,508.21

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Solution

The fourth proportional to 18,389.80, 27,563.10 and 8,508.21 is: 12,752.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,389.80 : 27,563.10 = 8,508.21 : x
  2. Step 2: Convert to fraction form
    18,389.80/27,563.10 = 8,508.21/x
  3. Step 3: Cross multiply
    18,389.80x = 27,563.10 × 8,508.21
  4. Step 4: Simplify right side
    18,389.80x = 234,512,643.05
  5. Step 5: Solve for x
    x = 234,512,643.05/18,389.80
  6. Step 6: Final answer
    x = 12,752.32

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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.