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Finding the Fourth Proportional to 8,999.54, 13,505.38 and 3,156.20

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Solution

The fourth proportional to 8,999.54, 13,505.38 and 3,156.20 is: 4,736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.54 : 13,505.38 = 3,156.20 : x
  2. Step 2: Convert to fraction form
    8,999.54/13,505.38 = 3,156.20/x
  3. Step 3: Cross multiply
    8,999.54x = 13,505.38 × 3,156.20
  4. Step 4: Simplify right side
    8,999.54x = 42,625,680.36
  5. Step 5: Solve for x
    x = 42,625,680.36/8,999.54
  6. Step 6: Final answer
    x = 4,736.43

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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.