Home / 6,429.60-9,620.10-4,242.60

Finding the Fourth Proportional to 6,429.60, 9,620.10 and 4,242.60

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Solution

The fourth proportional to 6,429.60, 9,620.10 and 4,242.60 is: 6,347.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,429.60 : 9,620.10 = 4,242.60 : x
  2. Step 2: Convert to fraction form
    6,429.60/9,620.10 = 4,242.60/x
  3. Step 3: Cross multiply
    6,429.60x = 9,620.10 × 4,242.60
  4. Step 4: Simplify right side
    6,429.60x = 40,814,236.26
  5. Step 5: Solve for x
    x = 40,814,236.26/6,429.60
  6. Step 6: Final answer
    x = 6,347.87

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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.