Home / 13,137.88-18,137.64-9,110.56

Finding the Fourth Proportional to 13,137.88, 18,137.64 and 9,110.56

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Solution

The fourth proportional to 13,137.88, 18,137.64 and 9,110.56 is: 12,577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.88 : 18,137.64 = 9,110.56 : x
  2. Step 2: Convert to fraction form
    13,137.88/18,137.64 = 9,110.56/x
  3. Step 3: Cross multiply
    13,137.88x = 18,137.64 × 9,110.56
  4. Step 4: Simplify right side
    13,137.88x = 165,244,057.48
  5. Step 5: Solve for x
    x = 165,244,057.48/13,137.88
  6. Step 6: Final answer
    x = 12,577.68

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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.