Home / 5,229.12-7,217.44-3,988.80

Finding the Fourth Proportional to 5,229.12, 7,217.44 and 3,988.80

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Solution

The fourth proportional to 5,229.12, 7,217.44 and 3,988.80 is: 5,505.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,229.12 : 7,217.44 = 3,988.80 : x
  2. Step 2: Convert to fraction form
    5,229.12/7,217.44 = 3,988.80/x
  3. Step 3: Cross multiply
    5,229.12x = 7,217.44 × 3,988.80
  4. Step 4: Simplify right side
    5,229.12x = 28,788,924.67
  5. Step 5: Solve for x
    x = 28,788,924.67/5,229.12
  6. Step 6: Final answer
    x = 5,505.50

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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.