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Finding the Fourth Proportional to 12,126.89, 18,151.86 and 7,957.01

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Solution

The fourth proportional to 12,126.89, 18,151.86 and 7,957.01 is: 11,910.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.89 : 18,151.86 = 7,957.01 : x
  2. Step 2: Convert to fraction form
    12,126.89/18,151.86 = 7,957.01/x
  3. Step 3: Cross multiply
    12,126.89x = 18,151.86 × 7,957.01
  4. Step 4: Simplify right side
    12,126.89x = 144,434,531.54
  5. Step 5: Solve for x
    x = 144,434,531.54/12,126.89
  6. Step 6: Final answer
    x = 11,910.27

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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.