Home / 3,839.36-5,298.40-2,160.72

Finding the Fourth Proportional to 3,839.36, 5,298.40 and 2,160.72

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Solution

The fourth proportional to 3,839.36, 5,298.40 and 2,160.72 is: 2,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,839.36 : 5,298.40 = 2,160.72 : x
  2. Step 2: Convert to fraction form
    3,839.36/5,298.40 = 2,160.72/x
  3. Step 3: Cross multiply
    3,839.36x = 5,298.40 × 2,160.72
  4. Step 4: Simplify right side
    3,839.36x = 11,448,358.85
  5. Step 5: Solve for x
    x = 11,448,358.85/3,839.36
  6. Step 6: Final answer
    x = 2,981.84

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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.