Home / 3,876.60-5,815.88-1,685.72

Finding the Fourth Proportional to 3,876.60, 5,815.88 and 1,685.72

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Solution

The fourth proportional to 3,876.60, 5,815.88 and 1,685.72 is: 2,529.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.60 : 5,815.88 = 1,685.72 : x
  2. Step 2: Convert to fraction form
    3,876.60/5,815.88 = 1,685.72/x
  3. Step 3: Cross multiply
    3,876.60x = 5,815.88 × 1,685.72
  4. Step 4: Simplify right side
    3,876.60x = 9,803,945.23
  5. Step 5: Solve for x
    x = 9,803,945.23/3,876.60
  6. Step 6: Final answer
    x = 2,529.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.