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Finding the Fourth Proportional to 12,676.88, 19,015.32 and 12,385.28

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Solution

The fourth proportional to 12,676.88, 19,015.32 and 12,385.28 is: 18,577.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,676.88 : 19,015.32 = 12,385.28 : x
  2. Step 2: Convert to fraction form
    12,676.88/19,015.32 = 12,385.28/x
  3. Step 3: Cross multiply
    12,676.88x = 19,015.32 × 12,385.28
  4. Step 4: Simplify right side
    12,676.88x = 235,510,062.49
  5. Step 5: Solve for x
    x = 235,510,062.49/12,676.88
  6. Step 6: Final answer
    x = 18,577.92

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Similar ratio
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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.