Home / 13,143.26-18,137.74-8,427.56

Finding the Fourth Proportional to 13,143.26, 18,137.74 and 8,427.56

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Solution

The fourth proportional to 13,143.26, 18,137.74 and 8,427.56 is: 11,630.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.26 : 18,137.74 = 8,427.56 : x
  2. Step 2: Convert to fraction form
    13,143.26/18,137.74 = 8,427.56/x
  3. Step 3: Cross multiply
    13,143.26x = 18,137.74 × 8,427.56
  4. Step 4: Simplify right side
    13,143.26x = 152,856,892.11
  5. Step 5: Solve for x
    x = 152,856,892.11/13,143.26
  6. Step 6: Final answer
    x = 11,630.06

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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.