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Finding the Fourth Proportional to 6,420.60, 9,609.30 and 5,902.20

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Solution

The fourth proportional to 6,420.60, 9,609.30 and 5,902.20 is: 8,833.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.60 : 9,609.30 = 5,902.20 : x
  2. Step 2: Convert to fraction form
    6,420.60/9,609.30 = 5,902.20/x
  3. Step 3: Cross multiply
    6,420.60x = 9,609.30 × 5,902.20
  4. Step 4: Simplify right side
    6,420.60x = 56,716,010.46
  5. Step 5: Solve for x
    x = 56,716,010.46/6,420.60
  6. Step 6: Final answer
    x = 8,833.44

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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.