Home / 3,815.47-5,265.54-2,136.78

Finding the Fourth Proportional to 3,815.47, 5,265.54 and 2,136.78

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Solution

The fourth proportional to 3,815.47, 5,265.54 and 2,136.78 is: 2,948.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.47 : 5,265.54 = 2,136.78 : x
  2. Step 2: Convert to fraction form
    3,815.47/5,265.54 = 2,136.78/x
  3. Step 3: Cross multiply
    3,815.47x = 5,265.54 × 2,136.78
  4. Step 4: Simplify right side
    3,815.47x = 11,251,280.82
  5. Step 5: Solve for x
    x = 11,251,280.82/3,815.47
  6. Step 6: Final answer
    x = 2,948.86

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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.