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Finding the Fourth Proportional to 7,405.70, 11,081.55 and 5,461.70

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Solution

The fourth proportional to 7,405.70, 11,081.55 and 5,461.70 is: 8,172.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.70 : 11,081.55 = 5,461.70 : x
  2. Step 2: Convert to fraction form
    7,405.70/11,081.55 = 5,461.70/x
  3. Step 3: Cross multiply
    7,405.70x = 11,081.55 × 5,461.70
  4. Step 4: Simplify right side
    7,405.70x = 60,524,101.64
  5. Step 5: Solve for x
    x = 60,524,101.64/7,405.70
  6. Step 6: Final answer
    x = 8,172.64

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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.