Home / 11,040.80-16,539.60-6,645.20

Finding the Fourth Proportional to 11,040.80, 16,539.60 and 6,645.20

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Solution

The fourth proportional to 11,040.80, 16,539.60 and 6,645.20 is: 9,954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,040.80 : 16,539.60 = 6,645.20 : x
  2. Step 2: Convert to fraction form
    11,040.80/16,539.60 = 6,645.20/x
  3. Step 3: Cross multiply
    11,040.80x = 16,539.60 × 6,645.20
  4. Step 4: Simplify right side
    11,040.80x = 109,908,949.92
  5. Step 5: Solve for x
    x = 109,908,949.92/11,040.80
  6. Step 6: Final answer
    x = 9,954.80

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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.