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Finding the Fourth Proportional to 7,172.97, 9,899.63 and 4,029.16

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Solution

The fourth proportional to 7,172.97, 9,899.63 and 4,029.16 is: 5,560.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.97 : 9,899.63 = 4,029.16 : x
  2. Step 2: Convert to fraction form
    7,172.97/9,899.63 = 4,029.16/x
  3. Step 3: Cross multiply
    7,172.97x = 9,899.63 × 4,029.16
  4. Step 4: Simplify right side
    7,172.97x = 39,887,193.21
  5. Step 5: Solve for x
    x = 39,887,193.21/7,172.97
  6. Step 6: Final answer
    x = 5,560.76

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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.