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Finding the Fourth Proportional to 12,157.16, 18,235.80 and 3,392.05

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Solution

The fourth proportional to 12,157.16, 18,235.80 and 3,392.05 is: 5,088.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.16 : 18,235.80 = 3,392.05 : x
  2. Step 2: Convert to fraction form
    12,157.16/18,235.80 = 3,392.05/x
  3. Step 3: Cross multiply
    12,157.16x = 18,235.80 × 3,392.05
  4. Step 4: Simplify right side
    12,157.16x = 61,856,745.39
  5. Step 5: Solve for x
    x = 61,856,745.39/12,157.16
  6. Step 6: Final answer
    x = 5,088.09

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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.