Home / 13,144.26-18,139.12-8,428.56

Finding the Fourth Proportional to 13,144.26, 18,139.12 and 8,428.56

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Solution

The fourth proportional to 13,144.26, 18,139.12 and 8,428.56 is: 11,631.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.26 : 18,139.12 = 8,428.56 : x
  2. Step 2: Convert to fraction form
    13,144.26/18,139.12 = 8,428.56/x
  3. Step 3: Cross multiply
    13,144.26x = 18,139.12 × 8,428.56
  4. Step 4: Simplify right side
    13,144.26x = 152,886,661.27
  5. Step 5: Solve for x
    x = 152,886,661.27/13,144.26
  6. Step 6: Final answer
    x = 11,631.44

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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.