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Finding the Fourth Proportional to 18,753.96, 28,122.30 and 11,723.16

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Solution

The fourth proportional to 18,753.96, 28,122.30 and 11,723.16 is: 17,579.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.96 : 28,122.30 = 11,723.16 : x
  2. Step 2: Convert to fraction form
    18,753.96/28,122.30 = 11,723.16/x
  3. Step 3: Cross multiply
    18,753.96x = 28,122.30 × 11,723.16
  4. Step 4: Simplify right side
    18,753.96x = 329,682,222.47
  5. Step 5: Solve for x
    x = 329,682,222.47/18,753.96
  6. Step 6: Final answer
    x = 17,579.34

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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.