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Finding the Fourth Proportional to 12,443.45, 18,655.46 and 8,484.90

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Solution

The fourth proportional to 12,443.45, 18,655.46 and 8,484.90 is: 12,720.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,443.45 : 18,655.46 = 8,484.90 : x
  2. Step 2: Convert to fraction form
    12,443.45/18,655.46 = 8,484.90/x
  3. Step 3: Cross multiply
    12,443.45x = 18,655.46 × 8,484.90
  4. Step 4: Simplify right side
    12,443.45x = 158,289,784.65
  5. Step 5: Solve for x
    x = 158,289,784.65/12,443.45
  6. Step 6: Final answer
    x = 12,720.73

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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.