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Finding the Fourth Proportional to 28,829.80, 43,246.05 and 9,109.90

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Solution

The fourth proportional to 28,829.80, 43,246.05 and 9,109.90 is: 13,665.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,829.80 : 43,246.05 = 9,109.90 : x
  2. Step 2: Convert to fraction form
    28,829.80/43,246.05 = 9,109.90/x
  3. Step 3: Cross multiply
    28,829.80x = 43,246.05 × 9,109.90
  4. Step 4: Simplify right side
    28,829.80x = 393,967,190.90
  5. Step 5: Solve for x
    x = 393,967,190.90/28,829.80
  6. Step 6: Final answer
    x = 13,665.28

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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.