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Finding the Fourth Proportional to 18,999.31, 28,502.02 and 5,851.67

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Solution

The fourth proportional to 18,999.31, 28,502.02 and 5,851.67 is: 8,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.31 : 28,502.02 = 5,851.67 : x
  2. Step 2: Convert to fraction form
    18,999.31/28,502.02 = 5,851.67/x
  3. Step 3: Cross multiply
    18,999.31x = 28,502.02 × 5,851.67
  4. Step 4: Simplify right side
    18,999.31x = 166,784,415.37
  5. Step 5: Solve for x
    x = 166,784,415.37/18,999.31
  6. Step 6: Final answer
    x = 8,778.45

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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.