Home / 11,201.20-15,456.75-6,485.78

Finding the Fourth Proportional to 11,201.20, 15,456.75 and 6,485.78

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Solution

The fourth proportional to 11,201.20, 15,456.75 and 6,485.78 is: 8,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,201.20 : 15,456.75 = 6,485.78 : x
  2. Step 2: Convert to fraction form
    11,201.20/15,456.75 = 6,485.78/x
  3. Step 3: Cross multiply
    11,201.20x = 15,456.75 × 6,485.78
  4. Step 4: Simplify right side
    11,201.20x = 100,249,080.02
  5. Step 5: Solve for x
    x = 100,249,080.02/11,201.20
  6. Step 6: Final answer
    x = 8,949.85

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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.