Home / 12,381.05-17,089.75-8,353.73

Finding the Fourth Proportional to 12,381.05, 17,089.75 and 8,353.73

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Solution

The fourth proportional to 12,381.05, 17,089.75 and 8,353.73 is: 11,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.05 : 17,089.75 = 8,353.73 : x
  2. Step 2: Convert to fraction form
    12,381.05/17,089.75 = 8,353.73/x
  3. Step 3: Cross multiply
    12,381.05x = 17,089.75 × 8,353.73
  4. Step 4: Simplify right side
    12,381.05x = 142,763,210.43
  5. Step 5: Solve for x
    x = 142,763,210.43/12,381.05
  6. Step 6: Final answer
    x = 11,530.78

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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.