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Finding the Fourth Proportional to 6,609.20, 9,905.40 and 2,709.20

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Solution

The fourth proportional to 6,609.20, 9,905.40 and 2,709.20 is: 4,060.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,609.20 : 9,905.40 = 2,709.20 : x
  2. Step 2: Convert to fraction form
    6,609.20/9,905.40 = 2,709.20/x
  3. Step 3: Cross multiply
    6,609.20x = 9,905.40 × 2,709.20
  4. Step 4: Simplify right side
    6,609.20x = 26,835,709.68
  5. Step 5: Solve for x
    x = 26,835,709.68/6,609.20
  6. Step 6: Final answer
    x = 4,060.36

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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.