Home / 3,681.86-5,080.93-2,189.75

Finding the Fourth Proportional to 3,681.86, 5,080.93 and 2,189.75

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Solution

The fourth proportional to 3,681.86, 5,080.93 and 2,189.75 is: 3,021.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.86 : 5,080.93 = 2,189.75 : x
  2. Step 2: Convert to fraction form
    3,681.86/5,080.93 = 2,189.75/x
  3. Step 3: Cross multiply
    3,681.86x = 5,080.93 × 2,189.75
  4. Step 4: Simplify right side
    3,681.86x = 11,125,966.47
  5. Step 5: Solve for x
    x = 11,125,966.47/3,681.86
  6. Step 6: Final answer
    x = 3,021.83

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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.