Home / 3,724.34-5,139.35-2,130.80

Finding the Fourth Proportional to 3,724.34, 5,139.35 and 2,130.80

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Solution

The fourth proportional to 3,724.34, 5,139.35 and 2,130.80 is: 2,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,724.34 : 5,139.35 = 2,130.80 : x
  2. Step 2: Convert to fraction form
    3,724.34/5,139.35 = 2,130.80/x
  3. Step 3: Cross multiply
    3,724.34x = 5,139.35 × 2,130.80
  4. Step 4: Simplify right side
    3,724.34x = 10,950,890.63
  5. Step 5: Solve for x
    x = 10,950,890.63/3,724.34
  6. Step 6: Final answer
    x = 2,940.36

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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.