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Finding the Fourth Proportional to 12,128.88, 16,737.84 and 6,824.88

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Solution

The fourth proportional to 12,128.88, 16,737.84 and 6,824.88 is: 9,418.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.88 : 16,737.84 = 6,824.88 : x
  2. Step 2: Convert to fraction form
    12,128.88/16,737.84 = 6,824.88/x
  3. Step 3: Cross multiply
    12,128.88x = 16,737.84 × 6,824.88
  4. Step 4: Simplify right side
    12,128.88x = 114,233,749.46
  5. Step 5: Solve for x
    x = 114,233,749.46/12,128.88
  6. Step 6: Final answer
    x = 9,418.33

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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.