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Finding the Fourth Proportional to 18,921.01, 28,385.64 and 5,773.03

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Solution

The fourth proportional to 18,921.01, 28,385.64 and 5,773.03 is: 8,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.01 : 28,385.64 = 5,773.03 : x
  2. Step 2: Convert to fraction form
    18,921.01/28,385.64 = 5,773.03/x
  3. Step 3: Cross multiply
    18,921.01x = 28,385.64 × 5,773.03
  4. Step 4: Simplify right side
    18,921.01x = 163,871,151.29
  5. Step 5: Solve for x
    x = 163,871,151.29/18,921.01
  6. Step 6: Final answer
    x = 8,660.80

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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.