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Finding the Fourth Proportional to 20,658.65, 30,988.04 and 8,181.62

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Solution

The fourth proportional to 20,658.65, 30,988.04 and 8,181.62 is: 12,272.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.65 : 30,988.04 = 8,181.62 : x
  2. Step 2: Convert to fraction form
    20,658.65/30,988.04 = 8,181.62/x
  3. Step 3: Cross multiply
    20,658.65x = 30,988.04 × 8,181.62
  4. Step 4: Simplify right side
    20,658.65x = 253,532,326.92
  5. Step 5: Solve for x
    x = 253,532,326.92/20,658.65
  6. Step 6: Final answer
    x = 12,272.45

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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.