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Finding the Fourth Proportional to 7,090.40, 10,621.20 and 5,794.40

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Solution

The fourth proportional to 7,090.40, 10,621.20 and 5,794.40 is: 8,679.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,090.40 : 10,621.20 = 5,794.40 : x
  2. Step 2: Convert to fraction form
    7,090.40/10,621.20 = 5,794.40/x
  3. Step 3: Cross multiply
    7,090.40x = 10,621.20 × 5,794.40
  4. Step 4: Simplify right side
    7,090.40x = 61,543,481.28
  5. Step 5: Solve for x
    x = 61,543,481.28/7,090.40
  6. Step 6: Final answer
    x = 8,679.83

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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.