Home / 7,140.42-9,853.78-3,996.61

Finding the Fourth Proportional to 7,140.42, 9,853.78 and 3,996.61

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Solution

The fourth proportional to 7,140.42, 9,853.78 and 3,996.61 is: 5,515.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.42 : 9,853.78 = 3,996.61 : x
  2. Step 2: Convert to fraction form
    7,140.42/9,853.78 = 3,996.61/x
  3. Step 3: Cross multiply
    7,140.42x = 9,853.78 × 3,996.61
  4. Step 4: Simplify right side
    7,140.42x = 39,381,646.43
  5. Step 5: Solve for x
    x = 39,381,646.43/7,140.42
  6. Step 6: Final answer
    x = 5,515.31

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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.