Home / 7,140.51-9,853.91-3,996.70

Finding the Fourth Proportional to 7,140.51, 9,853.91 and 3,996.70

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Solution

The fourth proportional to 7,140.51, 9,853.91 and 3,996.70 is: 5,515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.51 : 9,853.91 = 3,996.70 : x
  2. Step 2: Convert to fraction form
    7,140.51/9,853.91 = 3,996.70/x
  3. Step 3: Cross multiply
    7,140.51x = 9,853.91 × 3,996.70
  4. Step 4: Simplify right side
    7,140.51x = 39,383,122.10
  5. Step 5: Solve for x
    x = 39,383,122.10/7,140.51
  6. Step 6: Final answer
    x = 5,515.45

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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.