Home / 8,122.10-11,213.30-5,140.49

Finding the Fourth Proportional to 8,122.10, 11,213.30 and 5,140.49

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Solution

The fourth proportional to 8,122.10, 11,213.30 and 5,140.49 is: 7,096.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.10 : 11,213.30 = 5,140.49 : x
  2. Step 2: Convert to fraction form
    8,122.10/11,213.30 = 5,140.49/x
  3. Step 3: Cross multiply
    8,122.10x = 11,213.30 × 5,140.49
  4. Step 4: Simplify right side
    8,122.10x = 57,641,813.30
  5. Step 5: Solve for x
    x = 57,641,813.30/8,122.10
  6. Step 6: Final answer
    x = 7,096.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.