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Finding the Fourth Proportional to 9,187.75, 12,679.10 and 5,461.75

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Solution

The fourth proportional to 9,187.75, 12,679.10 and 5,461.75 is: 7,537.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.75 : 12,679.10 = 5,461.75 : x
  2. Step 2: Convert to fraction form
    9,187.75/12,679.10 = 5,461.75/x
  3. Step 3: Cross multiply
    9,187.75x = 12,679.10 × 5,461.75
  4. Step 4: Simplify right side
    9,187.75x = 69,250,074.43
  5. Step 5: Solve for x
    x = 69,250,074.43/9,187.75
  6. Step 6: Final answer
    x = 7,537.22

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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.