Home / 8,485.31-12,729.09-3,553.78

Finding the Fourth Proportional to 8,485.31, 12,729.09 and 3,553.78

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Solution

The fourth proportional to 8,485.31, 12,729.09 and 3,553.78 is: 5,331.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.31 : 12,729.09 = 3,553.78 : x
  2. Step 2: Convert to fraction form
    8,485.31/12,729.09 = 3,553.78/x
  3. Step 3: Cross multiply
    8,485.31x = 12,729.09 × 3,553.78
  4. Step 4: Simplify right side
    8,485.31x = 45,236,385.46
  5. Step 5: Solve for x
    x = 45,236,385.46/8,485.31
  6. Step 6: Final answer
    x = 5,331.14

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1.5x scale

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.