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Finding the Fourth Proportional to 12,656.44, 18,986.18 and 5,265.90

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Solution

The fourth proportional to 12,656.44, 18,986.18 and 5,265.90 is: 7,899.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.44 : 18,986.18 = 5,265.90 : x
  2. Step 2: Convert to fraction form
    12,656.44/18,986.18 = 5,265.90/x
  3. Step 3: Cross multiply
    12,656.44x = 18,986.18 × 5,265.90
  4. Step 4: Simplify right side
    12,656.44x = 99,979,325.26
  5. Step 5: Solve for x
    x = 99,979,325.26/12,656.44
  6. Step 6: Final answer
    x = 7,899.48

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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.