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Finding the Fourth Proportional to 13,891.78, 19,173.64 and 8,854.80

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Solution

The fourth proportional to 13,891.78, 19,173.64 and 8,854.80 is: 12,221.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.78 : 19,173.64 = 8,854.80 : x
  2. Step 2: Convert to fraction form
    13,891.78/19,173.64 = 8,854.80/x
  3. Step 3: Cross multiply
    13,891.78x = 19,173.64 × 8,854.80
  4. Step 4: Simplify right side
    13,891.78x = 169,778,747.47
  5. Step 5: Solve for x
    x = 169,778,747.47/13,891.78
  6. Step 6: Final answer
    x = 12,221.53

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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.