Home / 3,681.72-5,079.09-2,188.79

Finding the Fourth Proportional to 3,681.72, 5,079.09 and 2,188.79

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Solution

The fourth proportional to 3,681.72, 5,079.09 and 2,188.79 is: 3,019.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.72 : 5,079.09 = 2,188.79 : x
  2. Step 2: Convert to fraction form
    3,681.72/5,079.09 = 2,188.79/x
  3. Step 3: Cross multiply
    3,681.72x = 5,079.09 × 2,188.79
  4. Step 4: Simplify right side
    3,681.72x = 11,117,041.48
  5. Step 5: Solve for x
    x = 11,117,041.48/3,681.72
  6. Step 6: Final answer
    x = 3,019.53

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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.