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Finding the Fourth Proportional to 13,963.85, 20,945.73 and 5,643.77

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Solution

The fourth proportional to 13,963.85, 20,945.73 and 5,643.77 is: 8,465.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,963.85 : 20,945.73 = 5,643.77 : x
  2. Step 2: Convert to fraction form
    13,963.85/20,945.73 = 5,643.77/x
  3. Step 3: Cross multiply
    13,963.85x = 20,945.73 × 5,643.77
  4. Step 4: Simplify right side
    13,963.85x = 118,212,777.87
  5. Step 5: Solve for x
    x = 118,212,777.87/13,963.85
  6. Step 6: Final answer
    x = 8,465.63

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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.