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Finding the Fourth Proportional to 7,311.71, 10,090.11 and 3,954.49

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Solution

The fourth proportional to 7,311.71, 10,090.11 and 3,954.49 is: 5,457.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,311.71 : 10,090.11 = 3,954.49 : x
  2. Step 2: Convert to fraction form
    7,311.71/10,090.11 = 3,954.49/x
  3. Step 3: Cross multiply
    7,311.71x = 10,090.11 × 3,954.49
  4. Step 4: Simplify right side
    7,311.71x = 39,901,266.54
  5. Step 5: Solve for x
    x = 39,901,266.54/7,311.71
  6. Step 6: Final answer
    x = 5,457.18

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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.