Home / 21,912.08-30,233.84-12,953.44

Finding the Fourth Proportional to 21,912.08, 30,233.84 and 12,953.44

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Solution

The fourth proportional to 21,912.08, 30,233.84 and 12,953.44 is: 17,872.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.08 : 30,233.84 = 12,953.44 : x
  2. Step 2: Convert to fraction form
    21,912.08/30,233.84 = 12,953.44/x
  3. Step 3: Cross multiply
    21,912.08x = 30,233.84 × 12,953.44
  4. Step 4: Simplify right side
    21,912.08x = 391,632,232.41
  5. Step 5: Solve for x
    x = 391,632,232.41/21,912.08
  6. Step 6: Final answer
    x = 17,872.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.