Home / 3,877.90-5,815.81-1,686.11

Finding the Fourth Proportional to 3,877.90, 5,815.81 and 1,686.11

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Solution

The fourth proportional to 3,877.90, 5,815.81 and 1,686.11 is: 2,528.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.90 : 5,815.81 = 1,686.11 : x
  2. Step 2: Convert to fraction form
    3,877.90/5,815.81 = 1,686.11/x
  3. Step 3: Cross multiply
    3,877.90x = 5,815.81 × 1,686.11
  4. Step 4: Simplify right side
    3,877.90x = 9,806,095.40
  5. Step 5: Solve for x
    x = 9,806,095.40/3,877.90
  6. Step 6: Final answer
    x = 2,528.71

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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.