Home / 7,140.22-9,853.56-3,996.40

Finding the Fourth Proportional to 7,140.22, 9,853.56 and 3,996.40

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Solution

The fourth proportional to 7,140.22, 9,853.56 and 3,996.40 is: 5,515.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.22 : 9,853.56 = 3,996.40 : x
  2. Step 2: Convert to fraction form
    7,140.22/9,853.56 = 3,996.40/x
  3. Step 3: Cross multiply
    7,140.22x = 9,853.56 × 3,996.40
  4. Step 4: Simplify right side
    7,140.22x = 39,378,767.18
  5. Step 5: Solve for x
    x = 39,378,767.18/7,140.22
  6. Step 6: Final answer
    x = 5,515.06

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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.