Home / 3,780.50-5,216.70-2,101.64

Finding the Fourth Proportional to 3,780.50, 5,216.70 and 2,101.64

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Solution

The fourth proportional to 3,780.50, 5,216.70 and 2,101.64 is: 2,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.50 : 5,216.70 = 2,101.64 : x
  2. Step 2: Convert to fraction form
    3,780.50/5,216.70 = 2,101.64/x
  3. Step 3: Cross multiply
    3,780.50x = 5,216.70 × 2,101.64
  4. Step 4: Simplify right side
    3,780.50x = 10,963,638.43
  5. Step 5: Solve for x
    x = 10,963,638.43/3,780.50
  6. Step 6: Final answer
    x = 2,900.05

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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.