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Finding the Fourth Proportional to 6,609.56, 9,120.51 and 3,956.90

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Solution

The fourth proportional to 6,609.56, 9,120.51 and 3,956.90 is: 5,460.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,609.56 : 9,120.51 = 3,956.90 : x
  2. Step 2: Convert to fraction form
    6,609.56/9,120.51 = 3,956.90/x
  3. Step 3: Cross multiply
    6,609.56x = 9,120.51 × 3,956.90
  4. Step 4: Simplify right side
    6,609.56x = 36,088,900.42
  5. Step 5: Solve for x
    x = 36,088,900.42/6,609.56
  6. Step 6: Final answer
    x = 5,460.11

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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.