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Finding the Fourth Proportional to 12,377.66, 18,572.87 and 8,220.54

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Solution

The fourth proportional to 12,377.66, 18,572.87 and 8,220.54 is: 12,335.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,377.66 : 18,572.87 = 8,220.54 : x
  2. Step 2: Convert to fraction form
    12,377.66/18,572.87 = 8,220.54/x
  3. Step 3: Cross multiply
    12,377.66x = 18,572.87 × 8,220.54
  4. Step 4: Simplify right side
    12,377.66x = 152,678,979.65
  5. Step 5: Solve for x
    x = 152,678,979.65/12,377.66
  6. Step 6: Final answer
    x = 12,335.05

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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.