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Finding the Fourth Proportional to 7,090.72, 9,785.22 and 3,946.96

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Solution

The fourth proportional to 7,090.72, 9,785.22 and 3,946.96 is: 5,446.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,090.72 : 9,785.22 = 3,946.96 : x
  2. Step 2: Convert to fraction form
    7,090.72/9,785.22 = 3,946.96/x
  3. Step 3: Cross multiply
    7,090.72x = 9,785.22 × 3,946.96
  4. Step 4: Simplify right side
    7,090.72x = 38,621,871.93
  5. Step 5: Solve for x
    x = 38,621,871.93/7,090.72
  6. Step 6: Final answer
    x = 5,446.82

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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.