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Finding the Fourth Proportional to 12,178.08, 18,234.48 and 8,472.48

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Solution

The fourth proportional to 12,178.08, 18,234.48 and 8,472.48 is: 12,686.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.08 : 18,234.48 = 8,472.48 : x
  2. Step 2: Convert to fraction form
    12,178.08/18,234.48 = 8,472.48/x
  3. Step 3: Cross multiply
    12,178.08x = 18,234.48 × 8,472.48
  4. Step 4: Simplify right side
    12,178.08x = 154,491,267.11
  5. Step 5: Solve for x
    x = 154,491,267.11/12,178.08
  6. Step 6: Final answer
    x = 12,686.01

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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.