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Finding the Fourth Proportional to 7,321.64, 10,993.40 and 7,212.29

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Solution

The fourth proportional to 7,321.64, 10,993.40 and 7,212.29 is: 10,829.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.64 : 10,993.40 = 7,212.29 : x
  2. Step 2: Convert to fraction form
    7,321.64/10,993.40 = 7,212.29/x
  3. Step 3: Cross multiply
    7,321.64x = 10,993.40 × 7,212.29
  4. Step 4: Simplify right side
    7,321.64x = 79,287,588.89
  5. Step 5: Solve for x
    x = 79,287,588.89/7,321.64
  6. Step 6: Final answer
    x = 10,829.21

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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.