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Finding the Fourth Proportional to 6,609.99, 9,120.09 and 3,955.52

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Solution

The fourth proportional to 6,609.99, 9,120.09 and 3,955.52 is: 5,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,609.99 : 9,120.09 = 3,955.52 : x
  2. Step 2: Convert to fraction form
    6,609.99/9,120.09 = 3,955.52/x
  3. Step 3: Cross multiply
    6,609.99x = 9,120.09 × 3,955.52
  4. Step 4: Simplify right side
    6,609.99x = 36,074,633.02
  5. Step 5: Solve for x
    x = 36,074,633.02/6,609.99
  6. Step 6: Final answer
    x = 5,457.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.