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Finding the Fourth Proportional to 7,170.44, 9,895.86 and 4,187.72

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Solution

The fourth proportional to 7,170.44, 9,895.86 and 4,187.72 is: 5,779.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,170.44 : 9,895.86 = 4,187.72 : x
  2. Step 2: Convert to fraction form
    7,170.44/9,895.86 = 4,187.72/x
  3. Step 3: Cross multiply
    7,170.44x = 9,895.86 × 4,187.72
  4. Step 4: Simplify right side
    7,170.44x = 41,441,090.84
  5. Step 5: Solve for x
    x = 41,441,090.84/7,170.44
  6. Step 6: Final answer
    x = 5,779.43

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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.