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Finding the Fourth Proportional to 13,655.56, 20,485.14 and 4,891.48

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Solution

The fourth proportional to 13,655.56, 20,485.14 and 4,891.48 is: 7,337.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.56 : 20,485.14 = 4,891.48 : x
  2. Step 2: Convert to fraction form
    13,655.56/20,485.14 = 4,891.48/x
  3. Step 3: Cross multiply
    13,655.56x = 20,485.14 × 4,891.48
  4. Step 4: Simplify right side
    13,655.56x = 100,202,652.61
  5. Step 5: Solve for x
    x = 100,202,652.61/13,655.56
  6. Step 6: Final answer
    x = 7,337.86

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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.