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Finding the Fourth Proportional to 13,913.76, 20,871.60 and 5,593.79

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Solution

The fourth proportional to 13,913.76, 20,871.60 and 5,593.79 is: 8,391.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.76 : 20,871.60 = 5,593.79 : x
  2. Step 2: Convert to fraction form
    13,913.76/20,871.60 = 5,593.79/x
  3. Step 3: Cross multiply
    13,913.76x = 20,871.60 × 5,593.79
  4. Step 4: Simplify right side
    13,913.76x = 116,751,243.01
  5. Step 5: Solve for x
    x = 116,751,243.01/13,913.76
  6. Step 6: Final answer
    x = 8,391.06

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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.