Home / 13,855.05-19,117.41-8,190.72

Finding the Fourth Proportional to 13,855.05, 19,117.41 and 8,190.72

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Solution

The fourth proportional to 13,855.05, 19,117.41 and 8,190.72 is: 11,301.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.05 : 19,117.41 = 8,190.72 : x
  2. Step 2: Convert to fraction form
    13,855.05/19,117.41 = 8,190.72/x
  3. Step 3: Cross multiply
    13,855.05x = 19,117.41 × 8,190.72
  4. Step 4: Simplify right side
    13,855.05x = 156,585,352.44
  5. Step 5: Solve for x
    x = 156,585,352.44/13,855.05
  6. Step 6: Final answer
    x = 11,301.68

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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.