Home / 10,115.14-13,958.68-5,638.62

Finding the Fourth Proportional to 10,115.14, 13,958.68 and 5,638.62

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Solution

The fourth proportional to 10,115.14, 13,958.68 and 5,638.62 is: 7,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.14 : 13,958.68 = 5,638.62 : x
  2. Step 2: Convert to fraction form
    10,115.14/13,958.68 = 5,638.62/x
  3. Step 3: Cross multiply
    10,115.14x = 13,958.68 × 5,638.62
  4. Step 4: Simplify right side
    10,115.14x = 78,707,692.22
  5. Step 5: Solve for x
    x = 78,707,692.22/10,115.14
  6. Step 6: Final answer
    x = 7,781.18

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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.