Home / 3,815.40-5,265.13-2,136.88

Finding the Fourth Proportional to 3,815.40, 5,265.13 and 2,136.88

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Solution

The fourth proportional to 3,815.40, 5,265.13 and 2,136.88 is: 2,948.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.40 : 5,265.13 = 2,136.88 : x
  2. Step 2: Convert to fraction form
    3,815.40/5,265.13 = 2,136.88/x
  3. Step 3: Cross multiply
    3,815.40x = 5,265.13 × 2,136.88
  4. Step 4: Simplify right side
    3,815.40x = 11,250,950.23
  5. Step 5: Solve for x
    x = 11,250,950.23/3,815.40
  6. Step 6: Final answer
    x = 2,948.82

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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.