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Finding the Fourth Proportional to 13,661.93, 20,495.06 and 4,779.74

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Solution

The fourth proportional to 13,661.93, 20,495.06 and 4,779.74 is: 7,170.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.93 : 20,495.06 = 4,779.74 : x
  2. Step 2: Convert to fraction form
    13,661.93/20,495.06 = 4,779.74/x
  3. Step 3: Cross multiply
    13,661.93x = 20,495.06 × 4,779.74
  4. Step 4: Simplify right side
    13,661.93x = 97,961,103.35
  5. Step 5: Solve for x
    x = 97,961,103.35/13,661.93
  6. Step 6: Final answer
    x = 7,170.37

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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.