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Finding the Fourth Proportional to 12,561.69, 18,841.09 and 6,636.21

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Solution

The fourth proportional to 12,561.69, 18,841.09 and 6,636.21 is: 9,953.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.69 : 18,841.09 = 6,636.21 : x
  2. Step 2: Convert to fraction form
    12,561.69/18,841.09 = 6,636.21/x
  3. Step 3: Cross multiply
    12,561.69x = 18,841.09 × 6,636.21
  4. Step 4: Simplify right side
    12,561.69x = 125,033,429.87
  5. Step 5: Solve for x
    x = 125,033,429.87/12,561.69
  6. Step 6: Final answer
    x = 9,953.55

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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.