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Finding the Fourth Proportional to 18,659.90, 27,969.17 and 7,563.31

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Solution

The fourth proportional to 18,659.90, 27,969.17 and 7,563.31 is: 11,336.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.90 : 27,969.17 = 7,563.31 : x
  2. Step 2: Convert to fraction form
    18,659.90/27,969.17 = 7,563.31/x
  3. Step 3: Cross multiply
    18,659.90x = 27,969.17 × 7,563.31
  4. Step 4: Simplify right side
    18,659.90x = 211,539,395.41
  5. Step 5: Solve for x
    x = 211,539,395.41/18,659.90
  6. Step 6: Final answer
    x = 11,336.58

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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.