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Finding the Fourth Proportional to 8,125.54, 11,202.09 and 5,139.88

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Solution

The fourth proportional to 8,125.54, 11,202.09 and 5,139.88 is: 7,085.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.54 : 11,202.09 = 5,139.88 : x
  2. Step 2: Convert to fraction form
    8,125.54/11,202.09 = 5,139.88/x
  3. Step 3: Cross multiply
    8,125.54x = 11,202.09 × 5,139.88
  4. Step 4: Simplify right side
    8,125.54x = 57,577,398.35
  5. Step 5: Solve for x
    x = 57,577,398.35/8,125.54
  6. Step 6: Final answer
    x = 7,085.98

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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.