Home / 7,140.39-9,853.74-3,996.58

Finding the Fourth Proportional to 7,140.39, 9,853.74 and 3,996.58

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Solution

The fourth proportional to 7,140.39, 9,853.74 and 3,996.58 is: 5,515.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.39 : 9,853.74 = 3,996.58 : x
  2. Step 2: Convert to fraction form
    7,140.39/9,853.74 = 3,996.58/x
  3. Step 3: Cross multiply
    7,140.39x = 9,853.74 × 3,996.58
  4. Step 4: Simplify right side
    7,140.39x = 39,381,190.96
  5. Step 5: Solve for x
    x = 39,381,190.96/7,140.39
  6. Step 6: Final answer
    x = 5,515.27

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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.