Home / 7,680.43-11,520.63-2,415.89

Finding the Fourth Proportional to 7,680.43, 11,520.63 and 2,415.89

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Solution

The fourth proportional to 7,680.43, 11,520.63 and 2,415.89 is: 3,623.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,680.43 : 11,520.63 = 2,415.89 : x
  2. Step 2: Convert to fraction form
    7,680.43/11,520.63 = 2,415.89/x
  3. Step 3: Cross multiply
    7,680.43x = 11,520.63 × 2,415.89
  4. Step 4: Simplify right side
    7,680.43x = 27,832,603.61
  5. Step 5: Solve for x
    x = 27,832,603.61/7,680.43
  6. Step 6: Final answer
    x = 3,623.83

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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.