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Finding the Fourth Proportional to 19,641.69, 27,106.85 and 11,988.20

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Solution

The fourth proportional to 19,641.69, 27,106.85 and 11,988.20 is: 16,544.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,641.69 : 27,106.85 = 11,988.20 : x
  2. Step 2: Convert to fraction form
    19,641.69/27,106.85 = 11,988.20/x
  3. Step 3: Cross multiply
    19,641.69x = 27,106.85 × 11,988.20
  4. Step 4: Simplify right side
    19,641.69x = 324,962,436.91
  5. Step 5: Solve for x
    x = 324,962,436.91/19,641.69
  6. Step 6: Final answer
    x = 16,544.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.