Home / 11,880.46-17,820-3,115.38

Finding the Fourth Proportional to 11,880.46, 17,820 and 3,115.38

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Solution

The fourth proportional to 11,880.46, 17,820 and 3,115.38 is: 4,672.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,880.46 : 17,820 = 3,115.38 : x
  2. Step 2: Convert to fraction form
    11,880.46/17,820 = 3,115.38/x
  3. Step 3: Cross multiply
    11,880.46x = 17,820 × 3,115.38
  4. Step 4: Simplify right side
    11,880.46x = 55,516,071.60
  5. Step 5: Solve for x
    x = 55,516,071.60/11,880.46
  6. Step 6: Final answer
    x = 4,672.89

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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.