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Finding the Fourth Proportional to 18,656.80, 27,986.28 and 7,563.28

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Solution

The fourth proportional to 18,656.80, 27,986.28 and 7,563.28 is: 11,345.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.80 : 27,986.28 = 7,563.28 : x
  2. Step 2: Convert to fraction form
    18,656.80/27,986.28 = 7,563.28/x
  3. Step 3: Cross multiply
    18,656.80x = 27,986.28 × 7,563.28
  4. Step 4: Simplify right side
    18,656.80x = 211,668,071.80
  5. Step 5: Solve for x
    x = 211,668,071.80/18,656.80
  6. Step 6: Final answer
    x = 11,345.36

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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.