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Finding the Fourth Proportional to 9,159.18, 13,723.46 and 8,817.90

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Solution

The fourth proportional to 9,159.18, 13,723.46 and 8,817.90 is: 13,212.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.18 : 13,723.46 = 8,817.90 : x
  2. Step 2: Convert to fraction form
    9,159.18/13,723.46 = 8,817.90/x
  3. Step 3: Cross multiply
    9,159.18x = 13,723.46 × 8,817.90
  4. Step 4: Simplify right side
    9,159.18x = 121,012,035.45
  5. Step 5: Solve for x
    x = 121,012,035.45/9,159.18
  6. Step 6: Final answer
    x = 13,212.11

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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.