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Finding the Fourth Proportional to 12,600, 18,921.60 and 11,943.36

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Solution

The fourth proportional to 12,600, 18,921.60 and 11,943.36 is: 17,935.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,600 : 18,921.60 = 11,943.36 : x
  2. Step 2: Convert to fraction form
    12,600/18,921.60 = 11,943.36/x
  3. Step 3: Cross multiply
    12,600x = 18,921.60 × 11,943.36
  4. Step 4: Simplify right side
    12,600x = 225,987,480.58
  5. Step 5: Solve for x
    x = 225,987,480.58/12,600
  6. Step 6: Final answer
    x = 17,935.51

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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.