Home / 12,120.98-18,164.89-9,157

Finding the Fourth Proportional to 12,120.98, 18,164.89 and 9,157

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Solution

The fourth proportional to 12,120.98, 18,164.89 and 9,157 is: 13,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.98 : 18,164.89 = 9,157 : x
  2. Step 2: Convert to fraction form
    12,120.98/18,164.89 = 9,157/x
  3. Step 3: Cross multiply
    12,120.98x = 18,164.89 × 9,157
  4. Step 4: Simplify right side
    12,120.98x = 166,335,897.73
  5. Step 5: Solve for x
    x = 166,335,897.73/12,120.98
  6. Step 6: Final answer
    x = 13,722.97

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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.