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Finding the Fourth Proportional to 13,917.79, 20,862.60 and 5,596.21

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Solution

The fourth proportional to 13,917.79, 20,862.60 and 5,596.21 is: 8,388.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,917.79 : 20,862.60 = 5,596.21 : x
  2. Step 2: Convert to fraction form
    13,917.79/20,862.60 = 5,596.21/x
  3. Step 3: Cross multiply
    13,917.79x = 20,862.60 × 5,596.21
  4. Step 4: Simplify right side
    13,917.79x = 116,751,490.75
  5. Step 5: Solve for x
    x = 116,751,490.75/13,917.79
  6. Step 6: Final answer
    x = 8,388.65

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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.