Home / 12,380.29-17,087.31-8,402.68

Finding the Fourth Proportional to 12,380.29, 17,087.31 and 8,402.68

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Solution

The fourth proportional to 12,380.29, 17,087.31 and 8,402.68 is: 11,597.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,380.29 : 17,087.31 = 8,402.68 : x
  2. Step 2: Convert to fraction form
    12,380.29/17,087.31 = 8,402.68/x
  3. Step 3: Cross multiply
    12,380.29x = 17,087.31 × 8,402.68
  4. Step 4: Simplify right side
    12,380.29x = 143,579,197.99
  5. Step 5: Solve for x
    x = 143,579,197.99/12,380.29
  6. Step 6: Final answer
    x = 11,597.41

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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.