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Finding the Fourth Proportional to 7,149.59, 10,720.88 and 2,218.31

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Solution

The fourth proportional to 7,149.59, 10,720.88 and 2,218.31 is: 3,326.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.59 : 10,720.88 = 2,218.31 : x
  2. Step 2: Convert to fraction form
    7,149.59/10,720.88 = 2,218.31/x
  3. Step 3: Cross multiply
    7,149.59x = 10,720.88 × 2,218.31
  4. Step 4: Simplify right side
    7,149.59x = 23,782,224.22
  5. Step 5: Solve for x
    x = 23,782,224.22/7,149.59
  6. Step 6: Final answer
    x = 3,326.38

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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.