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Finding the Fourth Proportional to 13,690.91, 18,893.46 and 7,403.29

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Solution

The fourth proportional to 13,690.91, 18,893.46 and 7,403.29 is: 10,216.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.91 : 18,893.46 = 7,403.29 : x
  2. Step 2: Convert to fraction form
    13,690.91/18,893.46 = 7,403.29/x
  3. Step 3: Cross multiply
    13,690.91x = 18,893.46 × 7,403.29
  4. Step 4: Simplify right side
    13,690.91x = 139,873,716.25
  5. Step 5: Solve for x
    x = 139,873,716.25/13,690.91
  6. Step 6: Final answer
    x = 10,216.54

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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.