Home / 7,115.14-10,672.90-1,921

Finding the Fourth Proportional to 7,115.14, 10,672.90 and 1,921

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Solution

The fourth proportional to 7,115.14, 10,672.90 and 1,921 is: 2,881.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.14 : 10,672.90 = 1,921 : x
  2. Step 2: Convert to fraction form
    7,115.14/10,672.90 = 1,921/x
  3. Step 3: Cross multiply
    7,115.14x = 10,672.90 × 1,921
  4. Step 4: Simplify right side
    7,115.14x = 20,502,640.90
  5. Step 5: Solve for x
    x = 20,502,640.90/7,115.14
  6. Step 6: Final answer
    x = 2,881.55

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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.