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Finding the Fourth Proportional to 13,773.36, 20,660.27 and 7,212.36

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Solution

The fourth proportional to 13,773.36, 20,660.27 and 7,212.36 is: 10,818.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,773.36 : 20,660.27 = 7,212.36 : x
  2. Step 2: Convert to fraction form
    13,773.36/20,660.27 = 7,212.36/x
  3. Step 3: Cross multiply
    13,773.36x = 20,660.27 × 7,212.36
  4. Step 4: Simplify right side
    13,773.36x = 149,009,304.94
  5. Step 5: Solve for x
    x = 149,009,304.94/13,773.36
  6. Step 6: Final answer
    x = 10,818.66

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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.