Home / 3,712.80-5,123.49-2,119.47

Finding the Fourth Proportional to 3,712.80, 5,123.49 and 2,119.47

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Solution

The fourth proportional to 3,712.80, 5,123.49 and 2,119.47 is: 2,924.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.80 : 5,123.49 = 2,119.47 : x
  2. Step 2: Convert to fraction form
    3,712.80/5,123.49 = 2,119.47/x
  3. Step 3: Cross multiply
    3,712.80x = 5,123.49 × 2,119.47
  4. Step 4: Simplify right side
    3,712.80x = 10,859,083.35
  5. Step 5: Solve for x
    x = 10,859,083.35/3,712.80
  6. Step 6: Final answer
    x = 2,924.77

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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.