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Finding the Fourth Proportional to 12,596.88, 18,902.64 and 11,921.28

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Solution

The fourth proportional to 12,596.88, 18,902.64 and 11,921.28 is: 17,888.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,596.88 : 18,902.64 = 11,921.28 : x
  2. Step 2: Convert to fraction form
    12,596.88/18,902.64 = 11,921.28/x
  3. Step 3: Cross multiply
    12,596.88x = 18,902.64 × 11,921.28
  4. Step 4: Simplify right side
    12,596.88x = 225,343,664.18
  5. Step 5: Solve for x
    x = 225,343,664.18/12,596.88
  6. Step 6: Final answer
    x = 17,888.85

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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.