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Finding the Fourth Proportional to 12,478.59, 18,791.73 and 10,854.77

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Solution

The fourth proportional to 12,478.59, 18,791.73 and 10,854.77 is: 16,346.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.59 : 18,791.73 = 10,854.77 : x
  2. Step 2: Convert to fraction form
    12,478.59/18,791.73 = 10,854.77/x
  3. Step 3: Cross multiply
    12,478.59x = 18,791.73 × 10,854.77
  4. Step 4: Simplify right side
    12,478.59x = 203,979,813.09
  5. Step 5: Solve for x
    x = 203,979,813.09/12,478.59
  6. Step 6: Final answer
    x = 16,346.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.