Home / 11,019.20-16,539.60-5,478.80

Finding the Fourth Proportional to 11,019.20, 16,539.60 and 5,478.80

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Solution

The fourth proportional to 11,019.20, 16,539.60 and 5,478.80 is: 8,223.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,019.20 : 16,539.60 = 5,478.80 : x
  2. Step 2: Convert to fraction form
    11,019.20/16,539.60 = 5,478.80/x
  3. Step 3: Cross multiply
    11,019.20x = 16,539.60 × 5,478.80
  4. Step 4: Simplify right side
    11,019.20x = 90,617,160.48
  5. Step 5: Solve for x
    x = 90,617,160.48/11,019.20
  6. Step 6: Final answer
    x = 8,223.57

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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.