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Finding the Fourth Proportional to 12,504.88, 18,730.86 and 8,109.28

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Solution

The fourth proportional to 12,504.88, 18,730.86 and 8,109.28 is: 12,146.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,504.88 : 18,730.86 = 8,109.28 : x
  2. Step 2: Convert to fraction form
    12,504.88/18,730.86 = 8,109.28/x
  3. Step 3: Cross multiply
    12,504.88x = 18,730.86 × 8,109.28
  4. Step 4: Simplify right side
    12,504.88x = 151,893,788.38
  5. Step 5: Solve for x
    x = 151,893,788.38/12,504.88
  6. Step 6: Final answer
    x = 12,146.76

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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.