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Finding the Fourth Proportional to 18,659.76, 27,989.21 and 7,563.48

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Solution

The fourth proportional to 18,659.76, 27,989.21 and 7,563.48 is: 11,345.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.76 : 27,989.21 = 7,563.48 : x
  2. Step 2: Convert to fraction form
    18,659.76/27,989.21 = 7,563.48/x
  3. Step 3: Cross multiply
    18,659.76x = 27,989.21 × 7,563.48
  4. Step 4: Simplify right side
    18,659.76x = 211,695,792.23
  5. Step 5: Solve for x
    x = 211,695,792.23/18,659.76
  6. Step 6: Final answer
    x = 11,345.04

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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.