Home / 13,676.28-18,872.82-8,643.20

Finding the Fourth Proportional to 13,676.28, 18,872.82 and 8,643.20

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Solution

The fourth proportional to 13,676.28, 18,872.82 and 8,643.20 is: 11,927.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,676.28 : 18,872.82 = 8,643.20 : x
  2. Step 2: Convert to fraction form
    13,676.28/18,872.82 = 8,643.20/x
  3. Step 3: Cross multiply
    13,676.28x = 18,872.82 × 8,643.20
  4. Step 4: Simplify right side
    13,676.28x = 163,121,557.82
  5. Step 5: Solve for x
    x = 163,121,557.82/13,676.28
  6. Step 6: Final answer
    x = 11,927.33

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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.