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Finding the Fourth Proportional to 9,118.80, 13,672.08 and 4,679.16

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Solution

The fourth proportional to 9,118.80, 13,672.08 and 4,679.16 is: 7,015.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,118.80 : 13,672.08 = 4,679.16 : x
  2. Step 2: Convert to fraction form
    9,118.80/13,672.08 = 4,679.16/x
  3. Step 3: Cross multiply
    9,118.80x = 13,672.08 × 4,679.16
  4. Step 4: Simplify right side
    9,118.80x = 63,973,849.85
  5. Step 5: Solve for x
    x = 63,973,849.85/9,118.80
  6. Step 6: Final answer
    x = 7,015.60

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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.