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Finding the Fourth Proportional to 7,679.59, 11,520.92 and 2,415.92

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Solution

The fourth proportional to 7,679.59, 11,520.92 and 2,415.92 is: 3,624.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.59 : 11,520.92 = 2,415.92 : x
  2. Step 2: Convert to fraction form
    7,679.59/11,520.92 = 2,415.92/x
  3. Step 3: Cross multiply
    7,679.59x = 11,520.92 × 2,415.92
  4. Step 4: Simplify right side
    7,679.59x = 27,833,681.09
  5. Step 5: Solve for x
    x = 27,833,681.09/7,679.59
  6. Step 6: Final answer
    x = 3,624.37

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1.5x scale

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.