Home / 6,419.20-9,628.80-3,130.60

Finding the Fourth Proportional to 6,419.20, 9,628.80 and 3,130.60

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Solution

The fourth proportional to 6,419.20, 9,628.80 and 3,130.60 is: 4,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,419.20 : 9,628.80 = 3,130.60 : x
  2. Step 2: Convert to fraction form
    6,419.20/9,628.80 = 3,130.60/x
  3. Step 3: Cross multiply
    6,419.20x = 9,628.80 × 3,130.60
  4. Step 4: Simplify right side
    6,419.20x = 30,143,921.28
  5. Step 5: Solve for x
    x = 30,143,921.28/6,419.20
  6. Step 6: Final answer
    x = 4,695.90

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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.