Home / 2,686.28-4,032.45-2,072.70

Finding the Fourth Proportional to 2,686.28, 4,032.45 and 2,072.70

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Solution

The fourth proportional to 2,686.28, 4,032.45 and 2,072.70 is: 3,111.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.28 : 4,032.45 = 2,072.70 : x
  2. Step 2: Convert to fraction form
    2,686.28/4,032.45 = 2,072.70/x
  3. Step 3: Cross multiply
    2,686.28x = 4,032.45 × 2,072.70
  4. Step 4: Simplify right side
    2,686.28x = 8,358,059.12
  5. Step 5: Solve for x
    x = 8,358,059.12/2,686.28
  6. Step 6: Final answer
    x = 3,111.39

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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.