Home / 8,960.16-13,440.24-3,115.20

Finding the Fourth Proportional to 8,960.16, 13,440.24 and 3,115.20

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Solution

The fourth proportional to 8,960.16, 13,440.24 and 3,115.20 is: 4,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,960.16 : 13,440.24 = 3,115.20 : x
  2. Step 2: Convert to fraction form
    8,960.16/13,440.24 = 3,115.20/x
  3. Step 3: Cross multiply
    8,960.16x = 13,440.24 × 3,115.20
  4. Step 4: Simplify right side
    8,960.16x = 41,869,035.65
  5. Step 5: Solve for x
    x = 41,869,035.65/8,960.16
  6. Step 6: Final answer
    x = 4,672.80

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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.