Home / 5,617.20-8,425.80-3,430.20

Finding the Fourth Proportional to 5,617.20, 8,425.80 and 3,430.20

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Solution

The fourth proportional to 5,617.20, 8,425.80 and 3,430.20 is: 5,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,617.20 : 8,425.80 = 3,430.20 : x
  2. Step 2: Convert to fraction form
    5,617.20/8,425.80 = 3,430.20/x
  3. Step 3: Cross multiply
    5,617.20x = 8,425.80 × 3,430.20
  4. Step 4: Simplify right side
    5,617.20x = 28,902,179.16
  5. Step 5: Solve for x
    x = 28,902,179.16/5,617.20
  6. Step 6: Final answer
    x = 5,145.30

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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.