Home / 3,619.88-5,430.76-2,120.17

Finding the Fourth Proportional to 3,619.88, 5,430.76 and 2,120.17

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Solution

The fourth proportional to 3,619.88, 5,430.76 and 2,120.17 is: 3,180.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.88 : 5,430.76 = 2,120.17 : x
  2. Step 2: Convert to fraction form
    3,619.88/5,430.76 = 2,120.17/x
  3. Step 3: Cross multiply
    3,619.88x = 5,430.76 × 2,120.17
  4. Step 4: Simplify right side
    3,619.88x = 11,514,123.50
  5. Step 5: Solve for x
    x = 11,514,123.50/3,619.88
  6. Step 6: Final answer
    x = 3,180.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.