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Finding the Fourth Proportional to 13,919.77, 20,860.82 and 7,350.87

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Solution

The fourth proportional to 13,919.77, 20,860.82 and 7,350.87 is: 11,016.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.77 : 20,860.82 = 7,350.87 : x
  2. Step 2: Convert to fraction form
    13,919.77/20,860.82 = 7,350.87/x
  3. Step 3: Cross multiply
    13,919.77x = 20,860.82 × 7,350.87
  4. Step 4: Simplify right side
    13,919.77x = 153,345,175.91
  5. Step 5: Solve for x
    x = 153,345,175.91/13,919.77
  6. Step 6: Final answer
    x = 11,016.36

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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.