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Finding the Fourth Proportional to 18,641, 25,745.91 and 12,662.66

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Solution

The fourth proportional to 18,641, 25,745.91 and 12,662.66 is: 17,488.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641 : 25,745.91 = 12,662.66 : x
  2. Step 2: Convert to fraction form
    18,641/25,745.91 = 12,662.66/x
  3. Step 3: Cross multiply
    18,641x = 25,745.91 × 12,662.66
  4. Step 4: Simplify right side
    18,641x = 326,011,704.72
  5. Step 5: Solve for x
    x = 326,011,704.72/18,641
  6. Step 6: Final answer
    x = 17,488.96

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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.