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Finding the Fourth Proportional to 7,173.12, 9,899.52 and 4,029.12

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Solution

The fourth proportional to 7,173.12, 9,899.52 and 4,029.12 is: 5,560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173.12 : 9,899.52 = 4,029.12 : x
  2. Step 2: Convert to fraction form
    7,173.12/9,899.52 = 4,029.12/x
  3. Step 3: Cross multiply
    7,173.12x = 9,899.52 × 4,029.12
  4. Step 4: Simplify right side
    7,173.12x = 39,886,354.02
  5. Step 5: Solve for x
    x = 39,886,354.02/7,173.12
  6. Step 6: Final answer
    x = 5,560.53

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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.