Home / 6,417.20-9,625.80-3,128.60

Finding the Fourth Proportional to 6,417.20, 9,625.80 and 3,128.60

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Solution

The fourth proportional to 6,417.20, 9,625.80 and 3,128.60 is: 4,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,417.20 : 9,625.80 = 3,128.60 : x
  2. Step 2: Convert to fraction form
    6,417.20/9,625.80 = 3,128.60/x
  3. Step 3: Cross multiply
    6,417.20x = 9,625.80 × 3,128.60
  4. Step 4: Simplify right side
    6,417.20x = 30,115,277.88
  5. Step 5: Solve for x
    x = 30,115,277.88/6,417.20
  6. Step 6: Final answer
    x = 4,692.90

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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.