Home / 3,780.60-5,212.80-2,661.72

Finding the Fourth Proportional to 3,780.60, 5,212.80 and 2,661.72

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Solution

The fourth proportional to 3,780.60, 5,212.80 and 2,661.72 is: 3,670.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.60 : 5,212.80 = 2,661.72 : x
  2. Step 2: Convert to fraction form
    3,780.60/5,212.80 = 2,661.72/x
  3. Step 3: Cross multiply
    3,780.60x = 5,212.80 × 2,661.72
  4. Step 4: Simplify right side
    3,780.60x = 13,875,014.02
  5. Step 5: Solve for x
    x = 13,875,014.02/3,780.60
  6. Step 6: Final answer
    x = 3,670.06

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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.