Home / 6,531.20-9,790.40-3,412.80

Finding the Fourth Proportional to 6,531.20, 9,790.40 and 3,412.80

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Solution

The fourth proportional to 6,531.20, 9,790.40 and 3,412.80 is: 5,115.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,531.20 : 9,790.40 = 3,412.80 : x
  2. Step 2: Convert to fraction form
    6,531.20/9,790.40 = 3,412.80/x
  3. Step 3: Cross multiply
    6,531.20x = 9,790.40 × 3,412.80
  4. Step 4: Simplify right side
    6,531.20x = 33,412,677.12
  5. Step 5: Solve for x
    x = 33,412,677.12/6,531.20
  6. Step 6: Final answer
    x = 5,115.86

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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.