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Finding the Fourth Proportional to 13,890.60, 20,838.60 and 5,993.10

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Solution

The fourth proportional to 13,890.60, 20,838.60 and 5,993.10 is: 8,990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.60 : 20,838.60 = 5,993.10 : x
  2. Step 2: Convert to fraction form
    13,890.60/20,838.60 = 5,993.10/x
  3. Step 3: Cross multiply
    13,890.60x = 20,838.60 × 5,993.10
  4. Step 4: Simplify right side
    13,890.60x = 124,887,813.66
  5. Step 5: Solve for x
    x = 124,887,813.66/13,890.60
  6. Step 6: Final answer
    x = 8,990.81

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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.