Home / 5,256.90-7,881.35-2,661.70

Finding the Fourth Proportional to 5,256.90, 7,881.35 and 2,661.70

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Solution

The fourth proportional to 5,256.90, 7,881.35 and 2,661.70 is: 3,990.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,256.90 : 7,881.35 = 2,661.70 : x
  2. Step 2: Convert to fraction form
    5,256.90/7,881.35 = 2,661.70/x
  3. Step 3: Cross multiply
    5,256.90x = 7,881.35 × 2,661.70
  4. Step 4: Simplify right side
    5,256.90x = 20,977,789.30
  5. Step 5: Solve for x
    x = 20,977,789.30/5,256.90
  6. Step 6: Final answer
    x = 3,990.52

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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.