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Finding the Fourth Proportional to 13,919.71, 20,879.02 and 4,560.43

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Solution

The fourth proportional to 13,919.71, 20,879.02 and 4,560.43 is: 6,840.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.71 : 20,879.02 = 4,560.43 : x
  2. Step 2: Convert to fraction form
    13,919.71/20,879.02 = 4,560.43/x
  3. Step 3: Cross multiply
    13,919.71x = 20,879.02 × 4,560.43
  4. Step 4: Simplify right side
    13,919.71x = 95,217,181.98
  5. Step 5: Solve for x
    x = 95,217,181.98/13,919.71
  6. Step 6: Final answer
    x = 6,840.46

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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.