Home / 13,395.31-20,081.62-8,190.25

Finding the Fourth Proportional to 13,395.31, 20,081.62 and 8,190.25

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Solution

The fourth proportional to 13,395.31, 20,081.62 and 8,190.25 is: 12,278.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.31 : 20,081.62 = 8,190.25 : x
  2. Step 2: Convert to fraction form
    13,395.31/20,081.62 = 8,190.25/x
  3. Step 3: Cross multiply
    13,395.31x = 20,081.62 × 8,190.25
  4. Step 4: Simplify right side
    13,395.31x = 164,473,488.21
  5. Step 5: Solve for x
    x = 164,473,488.21/13,395.31
  6. Step 6: Final answer
    x = 12,278.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.